Which gas is responsible for global warming?

• oxygen

• chlorine

• carbon dioxide

• nitrogen

Formation of which of the following causes acid rain?

• sulphuric acid

• carbonic acid

• nitric acid

• acetic acid

in which layer of atmosphere do aeroplanes fly?

• lithosphere

• stratosphere

• exosphere

• none of the above

............ is responsible for global warming.

which of the following is responsible for ozone layer depletion?

• dust

• mist

• chloroflouro carbons

• none of the above