problem 1:

prepare down comprehensive note on types of the pollutants.

problem 2:

prepare down comprehensive note on the transbountary pollution.

problem 3:

Illustrate out the term air pollution. Discuss.

problem 4:

Make a distinction between soil degradation and soil erosion.

problem 5:

Illustrate out the term migration. prepare down the factors which affecting migration.

problem 6:

Illustrate out the concept toxicology.

problem 7:

Illustrate out the term ozone depletion. prepare down its effects.