Why are 2 stroke engines banned?

Related questions

1. Are 2 strokes better than 4 strokes?
2. Why are two stroke engines less efficient?
3. Why are 4 strokes better than 2 strokes?
4. Is RX 100 coming back?
5. Can you put 2 stroke gas in a lawn mower?
6. What is the most efficient engine?
7. What are the disadvantages of a two stroke engine?
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Tags

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2. #stroke
3. #india
4. #engines
5. #banned
6. #emits
7. #exhaust
8. #pollution
9. #under
10. #toxic
11. #pollutants
12. #strokes
13. #mentioned
14. #efficient
15. #limits
16. #substances
17. #which
18. #engine
19. #department