A holistic system of farming, which is primarily aimed at cultivating the land and raising crops in such a way, as to keep the soil alive and in good health in an eco-friendly pollution free environment.

1. Eco-friendly farming
2. Organic Farming
3. Primary farming
4. Preventive farming

Assertion (A): Pollution affects the air we breathe, the water we drink and the soil in which we grow our crops.

Reason (R): A comprehensive set of preventive measures are required to check the growing menace of pollution.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Name any two gases emitted by vehicular emissions.

What is meant by carpooling?