Page 2 - LP-2-MINDMAP-CH-13(AIR POLLUTION)

3. Smoke coming out of factory- The smoke that comes out of
factories contain large amount of carbon dioxide that pollutes the
air.
4. Sand storm and dust storm- In certain places sand storms and
dust storms pollute the air by adding sand and dust particles into
the air.
5. Volcanic eruptions- Volcanic eruptions release poisonous gases
into the air.

6. Forest fire- Forest fire also releases poisonous gases into the air.
7. Deforestation- The large scale cutting down of trees or clearing
forests is known as deforestation.
8. Burning fire crackers -Burning fire crackers during celebrations
add poisonous gases into the air.
9. Burning large heap of waste- It decreases the air quality.