CBSE Class 9 Answered

(a) Urbanization and industrialization is mainly responsible for the increase in environment pollution"

This is due to the following reasons:

i. Increased consumption of fossil fuels has increased the production of pollutants like CO₂, SO₂, NO₂, CO₂ etc.

ii. Release of CFC molecules in the atmosphere has led to depletion in ozone layer which results in the entry of U.V. rays into earth's atmosphere.

iii. Oxides of sulphur and nitrogen dissolve in rain water to produce acid rain.

(b) Measures to check environmental pollution:

i. Reduce consumption of fossil fuels.

ii. Planting more trees.

iii. Usage of non-conventional sources of energy e.g solar, wind, tidal energy.