The major pollution-causing agent is:

The Kyoto Protocol was endorsed at:

Ruthless exploitation and pollution of the environment has increased the magnitude of waste materials,which has disturbed the operations of all important:

For which major rivers in India has the Ministry of Environment formulated an action plan?

Among the $X$ most polluted cities in the world,Delhi ranked at $Y$ position. Identify $X$ and $Y$.

According to a $1990$ report,Delhi ranked $........$ among the $41$ most polluted cities in the world.