Which of the following is a major cause of environmental degradation?

1. Urbanisation.
2. Rapid increase in population.
3. Use of HYV seeds.
4. All of the above.

Which of the following is a major cause of supply-demand reversal?

1. Urbanisation.
2. Rapid increase in population.
3. Use of HYV seeds.
4. All of the above.

Which are the catch phases in the following UNCED definition of Sustainable Development:
 "Development that meets the need of the present generation without compromising the ability of the future generation to meet their own needs".

1. Need.
2. Future generation.
3. Need and present generation.
4. Need and future generation.

Environment includes:

1. Biotic factors.
2. Abiotic factors.
3. Both (a) and (b).
4. None of the above.

_______ is the cost of next best alternative sacrificed in order to take benefit of one given opportunity.

1. Absorptive capacity.
2. Carrying capacity.
3. Assimilation capacity.
4. Opportunity cost.

Which of the following animals help in controlling pests?

1. Snakes.
2. Owls.
3. Peacocks.
4. All of the above.

Name animals that help in bio-composting.

1. Cattles.
2. Earthworms.
3. Camel.
4. Both a and b.

In areas where speed of wind is usually high, wind mills can provide electricity without any adverse impact on the environment but it's not yet been explored on a large scale. What is the correct reason out of the following?

1. Lack of technological devices.
2. High cost.
3. Non-availability of land.

1. Only 2
2. Both 1 and 2
3. Both 2 and 3
4. All of these.

World's total iron-ore reserves accounted by India are nearly:

1. 10%
2. 20%
3. 30%
4. 40%

The environment performs four vital functions and the environment is able to perform these functions without any interruption as long as the demand on these functions is within its carrying capacity. 'In the given statement carrying capacity' implies to:

1. The resource extraction is not above the rate of regeneration.
2. Wastes generated are beyond the absorptive capacity of the environment.
3. The resource extraction is not below the rate of regeneration.
4. The resource and the wastes generated are within the assimilating capacity of the environment.

1. 1, 2 and 4
2. Both 2 and 4
3. Both 1 and 4
4. All of these.