Page 227 - Soil Degradation, Conservation and Remediation

216 6 Soil Pollution

2. What are wastes? Discuss modes of disposal of wastes in the environment. List
different soil pollutants and their sources.

3. Agrochemicals are a major source of soil pollution – explain. Give a list of pesticides
that contain hazardous compounds. Discuss persistence of pesticides.
4. Discuss in situ and ex situ remediation of organic pollutants. Bioremediation of

organic pollutants is environmentally more acceptable – discuss.
5. What are the environmentally important heavy metals? What are the effects

of heavy metals on plants, humans, and microorganisms? Mention the methods
of remediation of metal polluted soils.
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