Acid rain is caused by .......

Electrostatic Precipitator $(ESP)$:
$I.$ Is an electrical device to remove particulate matter present in the exhaust of thermal power plant.
$II.$ More than $99\, \%$ particulate matter can be removed by this method.
$III.$ $ESP$ has electrode wires and a stage of collecting plates.
Which of the statements given above are correct?

The phenomenon in which nutrient enrichment of a water body supports a dense growth of one or many organisms but decreases the species diversity is called:

At what level does noise become harmful noise pollution?

The below chart shows the sources of water pollution. Read the chart carefully and identify $A, B, C$ and $D$.

What is the effect of $DDT$ in birds?