How has the excess use of pesticides and fertilizers proved harmful ?

How can we reduce the excess use of plastics ?

What are the uses of chemical fertilizers ?

Use of pesticides is problematic as

What are the effects of use of fertilizers and pesticides for long period on soil fertility ? What are the causes of soil erosion ?

Why are manure and fertilizer used in fields ?

How can microorganisms be used to decrease the use of chemical fertilizers and pests ?

Nitrogen fertilizers are commonly used to promote the growth of plants and boost the crop yield. As a student of chemistry, can you suggest a farmer whether he should use excess nitrogen fertilizers to get maximum yield or not ?