Increasing demand for fossil fuels has caused harm to our environment. List its three ill-effects. Suggest three measures to reduce the consumption of fossil fuels.

(N/A) The ill-effects of burning fossil fuels are:
$(i)$ Air pollution,
$(ii)$ Global warming,and
$(iii)$ Acid rain.
The three measures to reduce the consumption of fossil fuels are:
$(i)$ Use of clean fuels like $CNG$,
$(ii)$ Use of public transport to reduce the number of private vehicles,
$(iii)$ Use of renewable energy sources like solar,wind,and hydroelectric power.