In a coal-based power plant,electrostatic precipitators are installed to control which of the following?

Which effect is caused by lead on catalytic converter?

Consider the following statements:
$I.$ Algal blooms are formed by free-floating algae.
$II.$ Algal blooms cause fish mortality and deterioration of water quality.
$III.$ Water hyacinth, the world's most problematic aquatic weed, is also called 'Terror of Bengal'.
Which of the statements given above are correct about algal blooms?

Differentiate between biodegradable pollutants and non-biodegradable pollutants.

$CNG$ is considered a more efficient fuel. Which of the following statements is incorrect regarding it?

Eutrophication is the result of