State the measures to control environmental pollution.

In environmental chemistry,the medium which is affected by a pollutant is called the

The term 'Biosphere' refers to:

When plants and animals decay,the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of

Which of the following solvents reduces the environmental pollution?

Given below are two statements :-
Statement $I :$ The value of the parameter "Biochemical Oxygen Demand $(BOD)$" is important for survival of aquatic life.
Statement $II :$ The optimum value of $BOD$ is $6.5 \ ppm$.
In the light of the above statements,choose the most appropriate answer from the options given below: