The delicate balance of $CO _2$ and $O _2$ is NOT disturbed by:
Burning of Coal
Deforestation
Burning of petroleum
Respiration
What are the reactions involved for ozone layer depletion in the stratosphere?
Polar stratospheric clouds facilitate the formation of .... .
What do you mean by green chemistry? How will it help decrease environmental pollution?
Mention the types of atmospheric pollution.
What do you mean by Biochemical Oxygen Demand $(BOD)$ ?