Write short notes on: Electrical energy generation and environment

Explanation

(i) The environment impact of electricity generation is significant because modern society needs large amount of electrical power.
(ii) The power is normally generated at power plants that converts some other kind of energy into electrical power.
(iii) Each system has some advantages and disadvantages, but many of them pose environmental concerns.
(iv) Thermal power plnats give out `CO_2,NO_2,SO_2` which causes air pollution.
(v) Nuclear power plant pose the threat of disposal of nuclear waste and radiation learkage.
(vi) Wind mills and solar power plants are eco-friendly but installation cost in high hence is used less frequently.
(vii) Hydroelectric power plants are Eco-friendly and generate sufficient electricity but rehabilitation of people is necessary, whose land is used for construction of dam.