Skip to content
Philoid
Browse Saved
Back to chapter
Biology
6. Natural Resources
Home · Class 9 · Biology · Ref. Book · 6. Natural Resources
Prev
Next
Q21 of 287 Page 362

Define air pollution.

Air pollution is defined as introduction of unwanted, harmful substances/molecules into the atmosphere that harms the life forms on earth.


More from this chapter

All 287 →
19

What would be the direction of air currents coming from Allahabad after it is intercepted by Himalaya in North?

20

What is rain gauge?

22

What is smog?

23

What is acid rain?

Questions · 287
6. Natural Resources
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 4 35 36 37 38 39 40 1 42 43 1 2 3 4 5 6 7 8 9 10 11 12
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved