Rain is called acid rain when its $pH$ is below

Nitrogen oxides are produced from the emissions of automobiles and power stations,which are a source of fine particulate matter in the air,leading to the formation of .....

According to recent reports on acid rain,industrial cities are affected by atmospheric pollution due to which of the following?

Which of the following is not used in catalytic converters?

The most hazardous metal pollutant used in automobiles is .....

Eutrophication of water bodies leading to the killing of fishes is mainly due to the non-availability of