Q. 244.7( 3 Votes )
(a) How does construction of dams across the river get linked with production of greenhouse gases?
(b) How do technological inputs improve the efficiency of bio-mass fuels?
(a) The vegetation gets submerged under the waters, in a dam. It rots under anaerobic conditions and produces methane, which is a greenhouse gas.
(b) Technological inputs to improve the efficiency of bio mass fuels are:-
(i) Burning wood in a limited supply of oxygen. The water and volatile materials present in the wood get removed and charcoal is left behind.
Charcoal burns flames and is relatively smokeless and with higher heating efficiency.
(ii) Similarly, cow dung, various plant materials like residue after harvesting the crops, vegetable waste and sewage are decomposed in the absence of oxygen to give bio gas
Rate this question :
Describe how hydro-energy can be converted into electrical energy. Write any two limitations of hydro-energy.Xam idea - Science
Justify that the hydropower is a renewable source of energy.All In One Science
Write the energy conversion that takes place in a hydropower plant.Science - Board Papers
Name two dams/projects which faced opposition over their construction from the local public.Together With Science