Question

Observe the diagram and answer the questions :
(a) Which energy is generated from the power plant ?
(b) State its source
(c) Which is more ecofriendly - Power generation from coal or Power generation from natural gas ? Why ?

Answer 1

(A) Mechanical energy is obtained from the fuel. A hydroelectric generator converts that mechanical energy into electricity.

(B) Hydroelectric power is produced with moving water. So, they are generally present near water sources.

(C) Natural gas is a fossil fuel, though the global warming emissions from its combustion are much lower than those from coal or oil. Natural gas emits 50 to 60 percent less carbon dioxide ($C{O}_2$) when combusted in a new, efficient natural gas power plant compared with emissions from a typical new coal plant . Example, when natural gas is burned, it produces 45 percent less carbon dioxide than coal, 30 percent less than oil and 15 percent less than wood.