Tuesday, May 27, 2008

Power Generating clothes

Power generating clothes should be an answer to the recharging problems for electronic gadget freaks. Out on the street, just when you are about to make an important call the battery of your cell runs out. This is one of the most annoying situations we face at least once every week. How we wish for an extra battery or a charger get could get hold of. Think out of the box think clothes that could add some juice to your i.pod’s or cell phone’s battery.
European and American scientists are working on such projects; tiny folding solar cells are being developed by EU research and development called H-Alpha Solar (H-AS). A pliable folding panel can be sewed on the outer side of the clothes with maximum sunlight expose, such as shoulders and back of a jacket. These slightly thicker then a photographic film solar cells will be attached to a circuit which should be able to convert this variable energy into consistent one. One should be able to just stand or move in sunlight or stand in front of photovoltaic light to charge a gadget attached to these power generating clothes.
Studio 5050 of TX USA has developed a white tiled frock each tile hides a solar cell capable of producing energy, the dress is made out of 448 such tiles, these tiles also accommodate RGB-LED’S, jumper circuits and 0 OHM resistors. The solar cells power the power generating dress whiles the tiles are attached with each other with metallic rings, making this power generating dress quite chic and sexy. Power is transferred through a control board. This power generating dress with little alteration can be turned into a serious wearable technology.
Although power generating clothes are more fun and experiment at the moment but with further development in power generating clothes and wearable, they can be put to medical use as well, specially in case of old people and young children these power generating clothes can create energy which can then be used as heat energy to protect them from cold and keeping them warm. This can also help in keeping cardiac batteries charged up.
A Swedish and Dutch-owned company Akzo-Nobel, a partner in the H-AS research, already has a pilot plant producing rolls of silicon cells 40 centimeters wide. If the company decides to continue the project a full-scale manufacturing plant could produce panels at a cost of about 1 euro ($1.34) per watt.Scientists have also developed a way to produce electrical energy by jostling fabric with tiny wires woven inside, raising the prospect of textiles that produce power simply by being stretched, rustled or ruffled by a breeze.
Thus power generating clothes should not only produce renewable energy through solar energy but also kinetic and wind energy. So next time you plan on purchasing an extra battery think again as you might find a jumper to do the job for you.

Thursday, May 22, 2008

Air powered cars

The next generation of environment friendly cars are about to hit Indian roads. TATA (Largest Indian car manufacturer) will be the brand producing these air powered cars. Indians are expecting to ride these zero emission vehicles as Mumbai taxi cabs. It is expected that some 6000 air powered cars will hit Mumbai roads on August 2008.
Inventor Guy Negre X-Formula one engineer, working for MDI a Luxembourg based company used compressed air, to push the pistons in the engine, instead of gas-and-oxygen explosions of internal-combustion models. These air powered cars should be astonishingly practical and sustainable. The City Cat is one of the few test models @ $13,000 strokes 60-70 mph and has the range of 125miles. Gas stations in Mumbai are expected to be equipped with air compressor units so refill for these cabs should not be an issue. More over the refill of its carbon fiber cylinder with 340 liters of air at 4350 PSI should not cost more then a twitter $2 for these air powered cars. Drivers also will be able to plug into the electrical grid and use the air powered car’s built-in compressor to refill the tanks in about 4 hours.
Critics of air powered cars say that these zero carbon emission vehicles are not a solution, as the electricity required to compress air for these cars will have a carbon impact during its production. But this really is not objection to pay heat upon, as India already falls #4 in wind energy production, thus with renewable energy getting common on daily bases this objection is just a propaganda of oil capitalists. Another objection on these air powered cars is that a huge amount of air will be taken from the atmosphere to fill up their tanks, the critics of air powered cars again have a no real objection as these cars will emit breathable clean air, thus they should be retiring air back to the atmosphere. Another positive point about these air powered cars is that there cylinders are made to split if there is an accident or leakage instead of bursting or shattering. But instead of getting too excited, we should show serious support so that the Oil God's don’t come down and buy (Or Take) the idea of air powered cars and bury it as it was done in past.
Some critics state that zero emissions is metaphoric, a term used for referring to Low toxic emissions. But the question is how low compared to the gas guzzling carbon coughing monsters on the road.
Critics of air powered cars are forgetting that fossil fuel is running out and getting expensive day by day. If the Mumbai air powered taxi cabs are successes full then we can have air powered buses and trams as they were in use in the past.
Read about air power engine conspiracy plotted after world war tow by the capitalists at :

Tuesday, May 20, 2008


Maglev wind turbines are the next big thing when it comes to mass production of wind energy. Although Maglev wind turbines work on a well known basic principal of magnetic levitation which is being used in turbines all over the world for quite long now. Maglev wind turbines though are based on the principal of magnetic levitation but with an edge, unlike regular turbines that use electromagnet for creating levitation, Maglev wind turbines would use permanent magnets instead of electromagnets which should result in eliminating the friction as the blades would float above the magnetic base. While Maglev wind turbines were in there research phase, critics world wide pointed that the cost of creating electromagnets powerful enough to keep the wind turbine from falling out or bumping, would be so high that the idea is an outlay faller. The chine’s research department [Guangzhou Energy Research Institute and Guangzhou Zhongke Hengyuan Energy Science & Technology Co] working on the Maglev wind turbines solved this problem by introducing permanent magnet which took place of the ball bearings in the structure thus, making these turbines virtually friction free for rotation, this also means that Maglev wind turbines possess the quality of electricity production on winds as low as 3mph. there is more that these wind turbines got to offer then just magnetic levitation, with the ability of production in low winds, Maglev wind turbines are a perfect solution to mass production of renewable electricity. It is expected that with 1000 amplified production hrs the Maglev wind turbines should be able to come with a capacity of 400 – 5000 watts. Maglev wind turbines also have the benefit of low maintenance cost, with the massive production capacity theses turbines are expected to replace 1000 traditional wind turbines, or it can be safely said one Maglev wind turbine will be a wind turbine farm on its own, supplying electricity to 750 thousand average homes. The maintenance cost on Maglev wind turbines will drop to 50 % compared to the traditional wind turbines. Chinese power company Zhongke Hengyuan Energy Technology
is currently building a $5M factory to produce the turbines in capacities from 400 to 5,000 watts.
Critics of Maglev wind turbines argue that this vertical axis wind turbine has serious design flaws.
The conflicting experts suppose that Maglev wind turbines has too many blades leaving the turbine to look "solid" to the wind as it speeds up in strong winds. Stators are also missing in the design to direct the flow more efficiently onto the blades. There are many other flaws that leave industry experts to wonder about this innovative concept and its true capacity but that is open to debate for the time being. As always, critics are playing there positive role, by simply rejecting the idea of Maglev wind turbines which is making it more and more popular, every new invention comes with faults which are refined with the passage of time, so we might see these Maglev wind turbines operational and powering our homes.

Monday, May 5, 2008


Sustainable Architecture simply means buildings and constructions that are made in contrast to the land and its surroundings. Sustainable architecture or green architecture is not a trend; it should not be treated as a trend or some new fashion. Sustainable architecture is all about being natural & following the human instinct being impressed by nature and its every day phenomenon. Natural landscapes all over the planet offer every thing required to create an inhabit, may it middle of a desert or top of a frosty mountain. While practicing Sustainable architecture elements nature has to offer on site or maybe all over the landscape but local are picked and worked with. Sustainable architecture Respects it ambiance, and the instead of standing out tries to become the part of the larger scenery, thus insuring sustainability as long as the landscape is sustainable.
Sustainable architecture is nothing new; in fact mankind was practicing sustainable architecture instinctively until the great industrial revolution and globalization over shadowed every aspect of our subsist.
Sustainable architecture resources, consumption & economical insecurity:
Sustainable architecture, available resources and consumption have a strong correlation. Sustainability can’t be achieved until consumption is based on passive use of the resources available. In modern economy with the increase in income consumption also increases, which leads to resource wastage.
Sustainable architecture tries to manage this resource wastage, through clever use of materials, and energy. Most modern architectures use standard building materials and designs; this leads to a lot of energy consumption. Ultimately increase in income is spend on managing such designs, this leads to economical insecurity. Sustainable architecture is a long-term investment that starts repaying with in couple of years.
Sustainable architecture & environment:
Sustainable architecture is another name of environment friendly architecture. Sustainable architecture is a serious approach towards decreasing our daily energy needs at work on roads and at home. In sustainable architecture aspects such as sustainable building materials, energy efficiency, use of renewable energy sources, waste management and building placement are considered carefully to make the most out of the structure. All these aspects of sustainable architecture decrease the negative impacts of any building on the environment.
Sustainable architecture & energy efficiency:
The most important function of sustainable architecture is energy efficiency, until the building stands. In sustainable deigns architects use different methods of constructions along with different materials to reduce the need of energy as much as possible. Sustainable architecture also uses techniques and methods through which buildings produce or capture there own energy using renewable energy sources actively and passively. Insulation is considered to be the most cost effective method of saving on heating, air conditioning. Well-insulated structures need less heat generating and air dissipating power. Ventilation comes next in sustainable architecture any design with poor ventilation consumes a lot of energy on air conditioning, properly designed ventilation in accordance to the local environment and weather reduced the need of air conditioning to less then half. In modern standard skyscrapers and houses, we relay on artificial or grid based energy so much so that 40% of world’s energy is consumed in these standard convenient designs.
Passive use of solar energy is one of the most effective features of sustainable architecture, use of high thermal mass products along with high quality insulations retain heat energy. Sustainable architecture also works with mobile solar shading such as shutters and blinds. Passive solar energy used in sustainable architecture also involves skylights that bring in sunlight thus reducing the need of electric lights during the day.
Active use of solar energy in sustainable architecture involves, generating electricity through, photovoltaic solar cells and solar water heaters. Energy efficient homes and building using solar water heaters, skylights and thermal insulation require very small amount of electricity to run machinery such as kitchen appliances other electronics, thus in sustainable architecture less electricity is consumed for heating, lighting and cooling the buildings.
Sustainable architecture & renewable energy sources:
Sustainable architecture not only creates energy efficient or low energy buildings but also formulate these buildings to produce their own energy. Many sustainable architecture designs have integrated photovoltaic solar cell on rooftops, along with solar water heaters for electricity and warm water. Another type or alternative energy source is also being infused with sustainable architecture and that is wind. Small wind turbines, and aero turbines are being installed on roofs and on poles in front of houses and skyscrapers. The most recent example of such sustainable architecture is BAHRAIN WORLD TRADE CENETER with three colossal 29 meters wind turbines installed in the middle of the two triangular towers.
Sustainable architecture & building placement:
No design falls into sustainable architecture unless the often-ignored aspect of appropriate building placement is brought under consideration. An energy efficient building in the middle of woods or far from residential urban areas is in reality an environmental deserter. Creating light urban mixed up residential commercial and industrial localities is sustainable. As a result of such light urban developments energy consumption of traveling reduces, thus carbon emissions decrease.
Sustainable architecture & sustainable materials:
Sustainable architecture uses materials such as fiberglass insulation, refractive glass, recycled wood, bamboos and non-toxic VOC paints and binding products. These days houses are being constructed with highly sustainable and energy efficient products such as straw bale and sand tubes.
Houses built out of straw bales are great for capturing thermal energy and sustaining them.
Sustainable architecture & waste management:
Sustainable architecture tends to recycle and reuse on site-produced waste such as gray water management, composting toilets in order to reduce sewage. Similarly sustainability includes composting and reducing kitchen waste.
Sustainable architecture and social sustainability:
Sustainable architecture leads to a sustainable living in a community. Sustainable buildings are equipped with features that promote sharing and communication among the inhabitants. Most common is power saving and sharing. Sustainable architecture also promotes community based micro agriculture. Rural studio in Hale county Alabama and Hundertwasser building and Dancing Rabbit Eco Village are some successful sustainable communities, where sustainable architecture is promoting social sustainability.
Sustainable architecture mankind and environment:
Sustainable architecture is no industry or a specific style of construction. About two centuries back mad brick and lime binding made two feet thick walls perfect shelters all over subcontinent, there was no concept of air conditioning as the roofs of the houses were high and ventilation was simple but effective. These high roof thick mud plastered wall worked as insulation in winters with closed windows. Europe was using stones and lime, which was a perfect shelter for freezing winters. People lived and survived without central heating for centuries with local heating systems. All over Europe and even America there were back yard kitchen gardens that provided great sustainability. Sustainable architecture is more like green foot prints, its like respecting the land and what ever the environment has to offer. Why should houses made in Newyork & Maxico city be same and utalize similar construction materials and energy when the landscapes are not same and the environment is opposite as well. Sustainable architecture dose not promote passive living, instead it helps us live fully and actively and harvest every thing nature offers us jealously with out wasting, may it be sunlight, wind water, food sustainable architecture is just an attempt to preserve and utilize intelligently.

Friday, May 2, 2008


Cleaner air and a greener world is the best gift we can give to our next generation. Use of Renewable energy is the key to an environment friendly world in which the human foot steps are much cleaner and greener, for the past eight decades with our carbon foot steps we have been marching all over mother earth making her ugly and less productive by every passing minute.
Renewable energy and its sources are not new at all; in fact planet earth is a composition of renewable energy resources. Today not only the modern and power full nations of the world are utilizing the renewable energy but also the poor and the third world countries are working hard to exploit these free and unlimited means of energy, careful use of renewable energy is a smart choice over fossil fuel, as environment friendly and renewable sources of energy help maintain the delicate balances created by nature for the survival of this planet.
Definition renewable energy:
If we wish to define renewable energy, it can be stated that renewable energy, are practically inexhaustible resources of energy, that are available free and in abundance and there exploitation is not harmful towards the life and any type of natural environmental balance on the planet.
Resource and types of renewable energy.
Life is renewable energy, if we look around carefully we should be able to find means of renewable energy all around us, in fact it is safe to state that renewable energy is what makes our days, days and nights, nights. We eat them and breath them, they satisfy our thirst, and hunger. In there natural and pure states they help improve our mental and physical health. There organized exploitation is ancient, and common.
Energy that is generated form SUN, WIND, WATER, TIDAL WAVE, BIOMASS and GEOTHERMAL POWER IS renewable energy. All these resources are naturally produced by actions and reactions that take place either on or with in the planet. On the other hand Sunlight, and solar reflection on the moon are coming to us from the atmosphere and space above the ozone layer, and solar energy is the major or basic driving force behind all resources of renewable energy.
Renewable energy and world’s energy production:
The share of renewable energy in world energy production and consumption is very low at the moment, according to the stats collected for 2006 only 18% of the global energy needs were being fulfilled through different sources of renewable energy, out of which 13% came from traditional wood and biomass burning, while the next biggest source of renewable energy is hydro power with 3% of its contribution in world energy production. Renewable energy was also generated through hot water, and its share was on 1.3%, rest of the 0.8% came from modern means of renewable energy such as geothermal, wind, solar, and ocean energy together.

Renewable energy and negative propaganda:
There is a great deal of negative propaganda against the different sources of renewable energy. Non-predictability, high cost, low production are the most common threats that are propagated against renewable energy. So much so that a large number of environmentalist accused windmill as a threat to the birds and other wild life. Close study of the situation reviled that due to large slow moving propeller modern wind turbines are not a threat to the wild life, in fact the number of birds and animal killed in road accidents by small and large vehicles is far more then those killed from renewable energy resources. On the other hand environmental contamination caused by conventional fossil fuel is responsible for the extinction of many precious species of wild life.

Renewable energy potential:
Though currently renewable energy makes a small portion of world’s energy, but renewable energy posses the potential to fulfill all global energy requirements. The market for renewable energy is increasing at a great pace in fact 100% growth in both solar and wind energy has been recorded in the past 5 years. Wind energy has installed capacity of over 100 GW worldwide, and this source of renewable energy is chiefly being utilized in Europe and USA. While 2000 MW was the manufactured photovoltaic products worldwide by 2006.
While Germany is investing in photovoltaic projects, Spain and USA, are concentrating on solar thermal power projects of renewable energy. The largest of solar thermal renewable energy power project is located Mojave Desert, with the production capacity of 354 MW at SEGS power plant, and the world's largest geothermal power installation is The Geysers in California, with a rated capacity of 750 MW.
Bio ethanol is another type of renewable energy which is driven from biomass, it wont be wrong to call it the an organic diesel. Brazil is the largest producer and user of bio diesel and ethanol now fulfils over 18% of the country’s fuel requirements.
Although large-scale renewable energy projects are a great relief to the environment, but the concept and the technology of renewable energy is best suited for small scale off the grid power production to avoid line loss. Small-scale renewable energy projects done on local and individual bases are a huge step towards sustainability.
It is evident that the cost and labor required supplying and maintaining power in far-flung isolated areas is often to high, and renewable energy seems to be the most efficient solution. Installation and implementation of renewable energy resources, such as solar power projects, wind energy, biogas and other alternative means of energy help create self sufficiency on individual and small scale community grounds.
Kenya for example has the larges ratio of individually owned over 30,000 solar power systems ranging from 20 to 100 watts as a source of renewable energy.
Fossil fuel and renewable energy:
Means of renewable energy and there application face a lot of opposition and competition with the multi trillion dollar fossil fuel industry. So much so that the capitalist involved in the oil and power business invested to promote negative press over the resources and utilization of renewable energy. The most common propaganda against renewable energy has been the major initial cost and inefficiency. Luckily with the passage of time, factors such as climate change, peak oil price and fuel insecurity helped renewable energy and its resources to gain the popularity and respect it deserved. Fossil fuel has been a major cause of centralization in distribution allover the world, an event-taking place in Asia has been effects felt all over Europe and USA. Now the increase in the cost of oil and the on going conspiracy scam of war on terror has created a great deal of instability and insecurity for people all over the world both in terms of fuel and food. Other then this our world is changing every day in terms of the environment, and climate. The air we breath in the water we drink and the food we eat is not safe and healthy any more all this again because of the increasing pollution. The delicate life cycle has been tempered and its taking its toll on mankind. In an era of such insecurity renewable energy seems to be the solution, which suits the best to modern human society. Renewable energy is able to fulfill our energy needs with little or no compromise on our luxurious lifestyles. Today in our much aware world its not hard to state that renewable energy is the source of keeping the civilization alive.
Renewable energy and global commitment:
With an increasing awareness about the global warming and environment change, the commitment towards a carbon free environment friendly world is becoming strong. More and more businesses and governments are working hard to look green. Use of renewable energy in public and private sector is also growing; companies that were doing huge businesses in the power sector are investing extensively in renewable energy. On the other hand governments are committing and working hard for switching on renewable energy. In march 2007 leaders of EU agreed on producing 20% of there energy from renewable energy resources, in order to cut carbon emissions at a significant rate.
The capital being poured in renewable energy was $ 80 billion in 2005, which jumped to $100 billion in 2006 and is mounting at a great pace. In 2007 the investment in renewable energy and alternative means of power increased even more. According to the renewable energy fuel mandate, USA is committed to an increase of 500% in the production of renewable energy fuels by the year 2022. this mandate is the part of EISA singed by president bush in December 2007, Read more [http://www.america.gov/st/texttrans-english/2008/March/20080305175150xjsnommis0.5022394.html].
Companies like, BP, GENERAL ELECTRIC, SHARP and the ROYAL DUTCH SHELL are investing in solar energy and other means of renewable energy sector.
Renewable energy employment and revenue:
According to the ASES report on renewable energy, 8 million people were employed in renewable energy production and distribution by 2006, this number is increasing significantly since then, ASES also stated that $ 933 billion were generated in the direct sales of renewable energy products and services in USA only, with profits of $100 billion. The increased federal and local government tax generation on renewable energy was $150 billion. According to this 2006 report 196,000 people were directly employed in the field of renewable energy and about 452,000 were involved indirectly employed one way or the other in renewable energy application and production.

Sun and renewable energy:

Almost all types of renewable energy are directly or indirectly driven from sun, in direct types of sun driven renewable energy, photovoltaic panels, solar heaters, solar thermal power plants are common. Sun is the driving force behind wind as well so wind driven renewable energy such as electricity generated from modern wind turbines, or renewable energy in form kinetic power for crushing wheat floor in traditional windmills. A large amount of solar radiation is absorbed by oceans and other water bodies and stored in form of thermal energy, which is another type of renewable energy. Solar energy is also responsible for wave motion which helps turn mechanical energy into electricity another great source of renewable energy. Sun light is responsible of photosynthetic in plants and other biomass which is becoming a popular source of renewable energy solar energy is also responsible for hydroelectric projects and power generation.

Main and modern renewable energy technologies:

· Sun driven renewable energy: Photovoltaic, solar water heating and solar thermal power plants.

· Wind driven renewable energy: wind mills and wind turbines.

· Water driven renewable energy: Hydro power projects, dams, wave power, tidal and tidal stream power, hydroelectric.

· Bio fuel and biomass renewable energy: biogas, bio ethanol, bio diesel, and solid biomass.

· Geothermal renewable energy: heat from earth core used for heating and power generation.
Solar renewable energy:

In the world of renewable energy the power directly driven from sunlight is termed as solar energy. Solar renewable energy can be produced in many ways but the most basic include:
Generating electricity using photovoltaic solar cells.
Generating electricity using concentrated solar power.
Generating electricity using by heating trapped air to rotate the turbines in a solar updraft tower.
Other solar renewable energy utilization includes, solar ovens and cookers, solar water heaters, solar chimneys and solar air conditioning. Even satellites are powered using solar renewable energy. Heating buildings using sunlight, and solar water and air heating does passive use of solar renewable energy.

Wind renewable energy:
Renewable energy through wind is not new; our primordial were using windmills for generating kinetic energy, in Persia, and in the Mediterranean. Netherlands been using wind mills to dry out shallow marshy areas for more land.
Modern wind turbines use this kinetic energy and convert it into electricity, this is one of the major sources of renewable energy with carbon emissions, airfoils or propellers are pushed and rotated due to there aero dynamics by wind, this rotation works on creating power from the dynamo generator of the wind turbines. Wind turbines range from 600 KV to 500 MW in terms of power, the most commonly used commercial wind turbines generate about 1.5-3 MW.
Wind power is the fastest growing source of renewable energy, not only huge wind turbine farms are being installed but also wind turbines are coming in small size for local community and individual use. With hybrid, savonius, darius types of wind turbines and efficient aero turbines wind mills are becoming the most common and wind spread source of renewable energy at the end of 2003 renewable energy produced through wind was over 40,000 MW. Currently the annual growth rate of renewable energy produced by wind turbines is about 30% annual. EU is switching to wind energy at a very fast pace in fact UK plans on switching all its power need and production on wind renewable energy by 2020. wind energy is not only being harvested on land but also from sea shores and off shore wind turbine farms as well. Off shore wind harvesting is 90% grater compared to the on land wind renewable energy production.
Wind speed near the earth surface varies so continues power generation can’t be garneted until combined with some sort of power inverter, and storage system. It is roughly estimated that conventional capacity of 1000MW of wind powered renewable energy results in only 333MW of continuous power.
In the UK, a licence to build the world's largest offshore windfarm, in the Thames estuary, has been granted. The London Array windfarm, 12 miles off Kent and Essex, should eventually consist of 341 turbines, occupying an area of 90 square miles. This is a £1.5 billion, 1,000 megawatt project, which will power one-third of London homes. The windfarm will produce an amount of energy that, if generated by conventional means, would result in 1.9 million tonnes of carbon dioxide emissions every year. It could also make up to 10% of the Government's 2010 renewables target.
Read more about Aero turbines at: http://thegreenbend.blogspot.com/2008/04/aeroturbine-next-generation-wind-energy.html

Water renewable energy:
Hydropower is an ancient type of renewable energy; Dams were made on streams, rivers, and deltas, for irrigation and production of renewable kinetic or mechanical energy. Water carries an amazing amount of motive and temperature difference renewable energy.
The renewable energy harnessed from water is 800 times denser then air.
Hydroelectric renewable energy is a term usually reserved for large-scale hydroelectric dams. Examples are the Grand Coulee Dam in Washington State and the Akosombo Dam in Ghana.
Micro hydro renewable energy systems are hydroelectric power installations that typically produce up to 100 kW of power. They are often used in water rich areas as a Remote Area Power Supply (RAPS).There are many of these installations around the world, including several delivering around 50 kW in the Solomon Islands.
Damless hydro renewable energy systems derive kinetic energy from rivers and oceans without using a dam.
Wave power uses the renewable energy in waves. The waves will usually make large pontoons go up and down in the water, leaving an area with reduced wave height in the "shadow". Wave power has now reached commercialization.
Tidal power captures renewable energy from the tides in a vertical direction. Tides come in, raise water levels in a basin, and tides roll out. Around low tide, the water in the basin is discharged through a turbine.
Tidal stream power captures renewable energy from the flow of tides, usually using underwater plant resembling a small wind turbine. Tidal stream power demonstration projects exist, and the first commercial prototype will be installed in Strangford Lough in September 2007.
Ocean thermal renewable energy conversion (OTEC) uses the temperature difference between the warmer surface of the ocean and the colder lower recesses. To this end, it employs a cyclic heat engine. OTEC has not been field-tested on a large scale.
Bio fuel and renewable energy:
Photosynthetic is a natural process under which plants produce biomass, which helps them grow. This biomass is also known as bio matter, and can be used directly as fuel or can be processed into bio fuel.
Bio fuel driven from agro products is bio diesel, ethanol or biogas.
Liquid bio fuel:
Liquid bio fuel is usually either a bio alcohol or bio ethanol fuel, such as bio diesel and vegetable oil. Bio fuels can be used in vehicles with little or no modification. Use of bio fuels reduces carbon emissions by 20% to 40%. Corn, sugar beet, switch grass, sugar cane and corn stalks are being grown in South and North America as well as Asia as specifically to produce different types of bio fuel renewable energy, such as ethanol a liquid fuel that can be used to run combustion engines. E85 is an example of renewable energy bio fuel that contains 85% ethanol and 15% gasoline and is being sold to the consumers.
Liquid bio fuel has reached its third generation and is now being produced from algae.
Read more about 3rd generation bio fuel at : http://environment2energy.blogspot.com/search?updated-max=2008-02-14T23%3A13%3A00%2B05%3A00&max-results=1
Biogas or anaerobic digestion renewable energy:
Biogas is a great source of renewable energy; this renewable energy is driven from organic waste produced by animals, humans and plants. For example bio methane gas is a renewable energy that is driven from a process of digestion done on animal dung and organic wastes, in this process bacteria breaks down the organic input which as a result releases methane gas, this methane gas can be used for producing electricity or an be used directly for fire. Renewable natural gas is a biogas which has been upgraded to a quality similar to natural gas. By upgrading the quality to that of natural gas, it becomes possible to distribute the gas to the mass market via gas grid. Alternatively biogas can be produced via advanced waste processing systems such as mechanical biological treatment. These systems recover the recyclable elements of household waste and process the biodegradable fraction in anaerobic digesters.
Bio gas renewable energy is being produced all over the world, India and other third world countries are using this renewable energy.
Geothermal renewable energy:
Heat trapped under the earth surface is another type of renewable energy, Such geothermal power sources exist in certain geologically unstable parts of the world such as Iceland, New Zealand, United States, the Philippines and Italy. The two most prominent areas for this in the United States are in the Yellowstone basin and in northern California. Iceland produced 170 MW geothermal power and heated 86% of all houses in the year 2000 through geothermal energy. Some 8000 MW of capacity is operational in total
Read more about geothermal renewable energy at : http://www.eia.doe.gov/kids/energyfacts/sources/renewable/geothermal.html

Renewable enrgy and world feature:
Although renewable energy is cattering a very tiny of the worlds current energy use but with factors like peek oil price and climate change it seems that renewable enrgy will be fueling the world with in next 3 to 4 decades.
Renewable energy is becoming cost effective day by day, new and cheaper types of solar panels and efficient aero turbines are becoming more and more available. Out put of renewable energy are also improving, alternative energy resources such as biogas and ethanols are also very promising. Huge companies that run on means of renewable enrgy, such as are launching products and daily use commodities like Air cars, solar motor bikes and solar mp3 players.
Read about these products that run on renewable energy at;

Sustainability and renewable energy
Many argue and contradict about the productivity of renewable energy, some say that they will pollute the environment, others argue about the cost and production myth. There are some who say that renewable energy covers vast lands, and there are those who say that production of renewable energy with agro product will create food insecurity.
All this negativity is just another organized capitalist gimmick in the favor of fossil fuel and globalization. Although the current fossil fuel powered globalization is the cause of famine, hunger, food and fuel insecurity and forged war on terror which was only started to capture the remaining hubs of oil.
Renewable energy is some thing very close to human nature of freedom and self-stuffiness. Renewable energy brings sustainability by freeing us from centralized grids. Renewable energy is responsible for a much cleaner air to breath and more over almost all sources of renewable energy start putting money back into our pockets in a few years. SO invest in renewable energy today and make money for the rest of your life.

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