The pesticide used as a preventive measure in buildings is

Rice fields produce an important greenhouse gas. Name it.

Choose the correct option regarding the following statements:
$(1)$ $CO_2$ contribution in global warming is $60\%$.
$(2)$ Greenhouse effect occurs due to deforestation.
$(3)$ Due to the greenhouse effect,the present average temperature at the surface of the Earth is $15^oC$.
$(4)$ The amount of $DDT$ in small fish is $0.05\ ppm$.

Nutrient enrichment of a lake will cause

The shell of an egg in birds becomes thin (not properly formed) due to the pollution of pesticides. This occurs due to disturbed:

In order to control environmental pollution,the Government of India has passed the .......... to protect and improve the quality of our environment.