Any material that is discarded after it has served its purpose and is no longer useful is called ……………. .

1. compost
2. waste
3. manure
4. pathogen

Assertion (A): The use and throw concept is a significant cause of waste accumulation.

Reason (R): With development in technology today waste generation is increasing.

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.

Assertion (A): Agricultural wastes cause environmental problems.

Reason (R): They become breeding ground for pathogens.

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.

Which of the following is NOT a toxic substances present in e-waste?

1. Cadmium
2. Lead
3. Mercury
4. Steel