Write two uses of $PCBs$.
$(i)$ As a fertilizer
$(ii)$ As a Detergent in cleaning
What are pesticides and herbicides ? Explain giving examples.
A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
State the name of components of photo-chemical smog. and Mention two solutions to control photo-chemical smog.
Write name of the pollutant found in Troposphere.
Mention the types of pollution.
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