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

Coliform is a group of bacteria whose presence in water indicates contamination.

Loss of biodiversity will lead to loss of ecological stability.

Wildlife does not cause any harm to forests.  

Syringes should not be recycled or reused as they can cause infection. So, it is better to discard these syringes by destroying them.

A leaky tap is required to be repaired so as to reduce the usage of natural resources.

Sustainable development is the form of growth that meets the current basic human needs, while preserving the resources for future generations.

As our resources are limited, we need to use them carefully. With the increase in human population, the demand for various resources is also increasing at an exponential rate. The management of natural resources requires a long term perspective, so that these resources will last for the generations to come and will not merely be used for short-term gains.

Watershed management emphasises soil and water conservation in order to increase biomass production. The aim is to develop primary resources of land and water to produce secondary resources to be used by plants and animals in a manner that will not cause any ecological imbalance.

The people who have been displaced by various development projects are largely poor tribals who do not get any benefit from these projects and are alienated from their lands and forests without adequate compensation.

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

The combustion of fossil fuels in insufficient air results in incomplete burning of the fuels, thereby releasing carbon monoxide.

Tawa Dam is located at the joining of Tawa river and Denwa river, in Hoshangabad district of Madhya Pradesh. It was built in 1978. It was mainly built for irrigation purpose. This dam irrigates a large area of Hoshangabad district.

Sakia is not an age-old concept of water harvesting, but an irrigation method of Nubia. Bandhara, kulh and eris are age-old concepts of water harvesting.

Construction of dams does not prevent earthquakes.