Explain how soil pollution and soil erosion could be prevented.

Solve the following crossword puzzle with the clues given:

Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6.Type of soil used for making pottery.
7.The living organism in the soil.
Down
1. In the desert, soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. The collective name for layers of soil.