The size of the Respirable Suspended Particulate Matter (RSPM) in air is :

Green Muffler is related to pollution of:

Which of the following is indicator of air pollution?

The main pollutant in the smoke coming from cigarette is

The marble of Taj Mahal is getting discoloured and lustureless due to :

In which year 'The Air (Prevention And Control of Pollution) Act' was enacted?