It is a technology with enormous potential.which could exploit the water resources to supply energy to remote rural areas with little access to conventional energy sources.It also eliminates most of the negative environmental effects associated with large hydro projects.
Energy From the Sea-Ocean Thermal,Tidal and Wave Energy
On an averaige,the 60 million square kilometre of the tropical seas absorb solar radiation equivalent to the heat content of 245 billion barrels of oil.Scientists feel that if this energy can be tapped a large source of energy will be available to the tropical countries and to other countries as well.The process of harnessing this energy is called OTEC.It uses the temperature differences between the surface of the ocean and the depths of about lOOOm to operate a heat engine.which produces electric power.
Energy is also obtained from wavcs and tides.In some countries such as Japan small scale power generators run by energy from waves of the ocean,have been used as power sources for channcl marking buoys.
Biomass
Biomass is a renewable energy resource derived from the carbonaceous waste of various human and natural activities.It is derived from numerous sources,including the by-products from the timber industry.agricultural crops,raw material from the forest,major parts of household waste and wood.
Biomass does not add carbon dioxide to the atmosphere as it absorbs the same amount of carbon in growing as it releases when consumed as a fuel. Its advantage is that it can be used to generate electricity with the same equipment of power plants that are now burning fossil fuels.Biomass is an important source of energy and the most important fuel worldwide after coal,oil and natural gas.
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