In the semi arid region of China the country inhabitants have practiced water harvesting for generation water harvesting is the process of collecting rainfall and /or runoff for later use . How does this water conservation method help the environment

it runs down the moutain and is reused

Explanation:

i got it right hope this helps :)

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.