Our Environment — Science STD 10 — Question

Although agriculture is important but there are some harmful effects of agricultural practices on the environment which are as follows:
Excessive cutting down of trees for agricultural purposes causes deforesting and during rain fall it may also result in soil erosion.
Excess drainage of groundwater for irrigation purposes lowers the water table. This results in acute water shortage at many places.
Synthetic fertilizers and pesticides used in the field during rain fall washed away to rivers and other bodies which cause water pollution.
The chemical pesticides, being non-biodegradable accumulates in organisms in increasing amounts at each trophic level commonly known as bio magnification.