Which of the following does not cause atmospheric pollution?

How is chemistry related to the environment? Describe it.

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:

Ozone depletion is due to the formation of the following compound in Antarctica:

Which of the following reactions is directly related to the corrosion of the Taj Mahal?

Planting more and more trees helps to