Which of the following harmful gases produced after burning of coal ?

The earth gives up  __________ energy into atmosphere.

Nitrogen trioxide so formed combines with water vapours present in the air results in formation of

Which of the following gas causes harm to plants by causing their leaves to dry up and fall off ?

Acid rain is caused by  ___________________

Ozone layer presents between which of the following two layers of oxygen ?

Welding is a source of which air pollutant ?

Green house effect refers to  _____________________

Select the one that has an adverse effect on ozone layer.

Respiratory problems mainly caused due to ______________