The soil pollutants that affect the food chain and food web by killing microorganisms and plants are

Effect of pollution is observed first on

Concentration of $DDT$ in small fishes is..... (in $, ppm$)

What is removed by the scrubber method in a chemical factory?

$A$ location with luxuriant growth of lichens on the trees indicates that the

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?