The impact of the environment

2. A gradual process that occurs when the impact of water or wind detaches and removes soil particles, causing the soil to deteriorate.
3. Capable of causing damange to living tissues, impairment of the central nervous system.
6. A destructive fire that spreads quickly over woodland or brush.
8. Made from decomposing plants and animals.
10. Unpleasant to drink.
12. The excess water inhibits gaseous exchange with the atmosphere and biological activity uses up available oxygen in the soil air and water.
14. The condition of being populated with excessively large numbers.
16. The introduction of harmful materials into the environment.
17. It has also been defined as "nutrient-induced" increase in phytoplankton productivity.
19. The production of noise.
20. Occurs in surface water and groundwater leaching into the soil and from there into the water supply from various sources.

1. The activity or business of felling trees and cutting and preparing the timber.
4. The practise of defecating in fields, forests, bushes, bodies of water, or other open spaces.
5. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitrogen oxides, which combine with atmospheric water to form acids.
7. The contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere.
9. The action of clearing a wide area of trees.
11. The extraction of sand, mainly through and open pit or sand pit.
13. These changes have a broad range of observed effects that are synonymous with the term.
15. The science of practice of farming, which includes soil cultivation for agricultural production and animal rearing for food, wool, and other goods.
18. The process of extracting useful materials from the earth.