Air pollution:-
The addition of any substance to environment which badly effects the quality of environment and cause damage to humans, animals and plants is called …………
a) cleanliness
b) pollution
c) both a & b
d) none of these
Air pollution is the change of composition of air by addition of harmful substances like…
a) CO2
b) NOx
c) SO2
d) all of these
WHO is stands for…………
a) world humans organization
b) world health organization
c) wide health organization
d) none of these
Air pollution is a change in the …………characteristics of air that cause adverse effects on humans and other organisms.
a) physical
b) biological
c) chemical
d) all of these
……are gases and particles in the atmosphere that harm organisms and effect climate.
a) germs
b) air pollutants
c) virus
d) bacteria
