The device which can remove particulate matter present in the exhaust from a thermal power plant is:

Which of the following is considered the most harmful air pollutant among the given options?

Acid rain is the secondary effect of

In almost all Indian metropolitan cities like Delhi,the major atmospheric pollutant$(s)$ is/are

For the control of air pollution in Delhi, all buses of Delhi were converted to run on $A$ by the end of $B$ as per the directives of the $C$. Complete the given statement by choosing appropriate options for $A-C$.

The following figure shows an electrostatic precipitator. Identify $P, Q,$ and $R$.