Worldwide, geothermal plants have the capacity to generate about 10 GW as of 2010, and in practice generate 0.6% of global electricity demand. An additional 28 GW of direct geothermal heating capacity is installed for district heating, space heating, spas, industrial processes, desalination and agricultural applications.
Generating power using high temp & pressure steam below the Earth surface.
This temp varies from 25 to 50 0 c per KM
Types: Natural geysers Artificial geysers NATURAL GEYSERS : In some place, the hot water comes out of the ground through cracks naturally in the form of natural geysers . ARTIFICIAL GEYSERS : In some place we can drill a hole up to the hot region and through pipes we can transfer the hot steam.
Plants use photosynthesis to grow and produce biomass. Also known as bio matter, biomass can be used directly as fuel or to produce liquid bio fuel
Information on pump, California. Liquid bio fuel is usually either a bio alcohol such as ethanol or a bio-oil such as biodiesel and straight vegetable oil. Biodiesel can be used in modern diesel vehicles with little or no modification to the engine and can be made from waste and virgin vegetable and animal oil and fats (lipids).
TYPES: USING BIOGAS Wood , seed, cattle dung, agricultural waste etc. USING BIOFUEL ethanol , methanol, gasohol etc . The higher heating value of cellulose is about 17.4 MJ/kg . The estimated yield of ethanol from dry cellulose is about 0.2 kg of ethanol per kg of cellulose  (60 gal/ton). Since the higher heating value of ethanol is 29.7 MJ/kg of ethanol it would be 5.94 MJ/kg of the cellulose