Who was the Bishnoi woman known for her contribution to forest conservation?

What is the full form of $CPCB$?

The pollution in a city like $Delhi$ may be controlled to a great extent by:

Human activities interfere with the carbon cycle. List any two such activities.

The limit of $BOD$ prescribed by the Central Pollution Control Board $(CPCB)$ for the discharge of industrial and municipal wastewater into natural surface waters is

The standard of living is very badly affected by