Reducing the amount of waste produced is the best way to help the environment. For example, cars use up energy and cause pollution. Some ways to reduce the environmental damage caused by cars include carpooling with friends, walking, taking the bus or riding a bicycle.

The Chipko movement originated in Khejarli village. The name of the movement comes from the word 'embrace', as the villagers hugged the trees and prevented the contractors from felling them.

Plastic is non-biodegradable and harmful to the atmosphere. Therefore, its use should be minimised.

Options (1), (2) and (3) are the consequences of building large dams. Building of dams does not have any effect on depletion of the ozone layer (ozone layer protects the Earth from harmful UV radiations of the Sun). Ozone layer gets depleted due to the use of chlorofluorocarbons. 

Before recycling a waste product, it is segregated and sorted out so that different types of materials are differentiated and categorised for further processes.

Tendu leaf (leaf of Diospyros melanoxylon) is considered to be the most suitable for making bidi wrappers, on account of the ease with which it can be rolled and its wide availability. The use of tendu leaves in bidi industry is mainly based on their enormous production, agreeable flavour, flexibility, resistance to decay and capacity to retain fire.

Khadin, also called dhora, is a construction designed to harvest surface runoff water for agriculture. It was first designed in western Rajasthan in the 15^th century.

Coal and petroleum take millions of years to form. Due to this reason, they are exhaustible substances.

Narmada Bachao Andolan (‘Save the Narmada’ movement) is a non-governmental organisation (NGO). It was about raising the height of Sardar Sarovar Dam on the river Narmada. Therefore, the correct answer is Sardar Sarovar Dam.

Nitrogen oxide and sulphur dioxide are important constituents of acid rain. 

Large mega projects neglect local irrigation methods. These large scale projects (dams and canals) were developed by the British and are still carried on by our government.

It does not provide breeding ground for mosquitoes as this water is below ground and not available to mosquitoes for breeding.

Fossil fuels are conventional sources of energy.

Forests are the hotspots of biodiversity. A measure of biodiversity of an area is the number of species found there.

Chipko means 'hugging'. Chipko movement means ‘tree hugging’ movement. The movement was known for its tactic of hugging trees to prevent them from being cut down. It was done to prevent commercial timber harvesting.