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Old Wednesday, February 22, 2017
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Shahkaar Shahkaar is offline
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1. Biodiversity year: 2010
2. Montreal protocol: 1987
3. Ozone: blue
4. Which pyramid is not inverted: Both (energy and numbers)
5.Gas used in industry: Carbontetrachloride
6. High BOD: Highly polluted
7. When water is discharged into river, it should not: increase the salinity of the river
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