Q: Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Soil erosion Deforestation and excessive crop irrigation enhance soil erosion. Given the two facts above, what and excessive crop irrigation enhance negative impacts on the environment?

pick from the following.
+ contamination;
+ drought;
+ humans disturb it;
+ Pollution;
+ Greenhouse gasses;
+ Deforestation;
+ uncontrolled;
+ threatened;
The answer is:
Deforestation