Which of the following is a secondary pollutant?.

Which one of have low rate of air pollution

Wind blown acidic gases and particles settle down from the atmosphere on to the earth is called

Higher the BOD, lower would be

Brown air in traffic congested city is caused by

Large no. of microbes and high level of water pollution indicated by

The process of deposition of acid on earth from the atmosphere is called

Most effective device to remove particulate pollutants

Major source of methane in India is

Biocides is an example for