Soil erosion can be prevented by : 

1. Overgrazing

2. Removal of vegetation

3. Afforestation (Plantation)

4. Increasing bird population

What is the process involved for a good produce in the treatment of bad odour, flies, and recycling of waste?

1. It should be kept covered.

2. The recyclable waste should not be dumped in the compost-producing pit.

3.  It should be sent to the industries through vendors for recycling. 

4. All of the above.

The example(s) of pesticide is/are-

1. Aldrin

2. Sodium chlorate

3. Dieldrin

4. Both (1) and (3)

The correct statement about domestic waste is :

The major source(s) of soil pollution is/are:

1. Industrial waste.

2. Fertilizers and pesticides.

3. Organic compost.

4. Both (1) are (2)

Domestic waste will lead to : 

1. Biodegradable pollution

2. Nondegradable pollution

3. Thermal pollution of soil

4. Air pollution