According to a new government report India's greenhouse gas (GHG) emissions rose by 58 percent between 1994 and 2007. Greenhouse gases are those gases that can absorb and emit infrared radiation. Which one of the following is not a green house gas?

Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?

With reference to food chains in ecosystems, consider the following statements :
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.

Which of the statements given above is / are correct?

Acid rain is caused by the pollution of environment by

Which one of the following terms describes not only the physical space occupied by an organism, but also its functiona l role in the community of organisms?

Contour bunding is a method of conservation used in