The cause of polluted rain water is;
a) Road dust
b) Industrial smoke
c) Water vapors in the air
d) Oil spills
Polluted rain water damages;
a) Trees
b) Buildings
c) Life in ponds and lakes
d) All above
Most polluted river in the world is…………
a) Yamuna
b) Chenab
c) Ganga
d) none of these
The germs present in the sewage of hospitals and gutters cause;
a) Air pollution
b) Water pollution
c) Land pollution
d) Both air and water pollution
These are the main causes of land pollution;
a) Agriculture wastes and fertilizer
b) Chemical sprayed on crops
c) Solid waste from factories
d) All of above
A greenhouse gas that absorbs energy and maintains earth temperature is.
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) argon
