Question

1. Highest percentage of air consists of
a. Oxygen
b. Carbon dioxide
c. Nitrogen
d. Argon
2. The Taj Mahal is being affected by
a. Noise pollution
b. Air pollution
c. Water pollution
d. None of these
3. Most polluted river in the world is
a. Yamuna
b. Cavery
C. Chenab
d. Ganga
4. Air pollution causes
a. Global warming
b. Respiratory problems
c. Soil erosion
d. None of these​

Answer 1

Answer:

1-c, 2-b, 3-don't know, 4-b

Answer 2

1.Nitrogen
2.air pollution
3.Ganga
4.Respiratory problems