Toxic matters like mercury, lead, chromium, arsenic, etc. are found in;
a) Freshwater pond
b) Sewage water
c) Rainwater
d) Industrial waste
Air pollution cause diseases of;
a) Throat
b) Skin
c) Eyes
d) All above
In plants Air pollution slows down the process of;
a) Photosynthesis
b) Respiration
c) Digestion
d) Circulation
CNG is a………………….
a) Polluted fuel
b) Clean fuel
c) Harmful fuel
d) all of these
When fuel is burned in industries …………..is produced in the air.
a) Carbon dioxide
b) Oxygen
c) Ozone
d) Nitrogen
Typhoid can be caused by the germs present in
a) fertilizers
b) pesticides
c) sewage water
d) industrial waste
