Why are two stroke engines banned?

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Tags

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