5 lessons • 49m

Air Pollution and its Control (in Hindi)

10m 20s

Water Pollution and its Control (in Hindi)

14m 07s

Solid Waste, Radioactive Waste, Agrochemical and their Effect (in Hindi)

10m 00s

Green House Effect Global Warming and Ozone Depletion (in Hindi)

9m 48s

Deforestation (in Hindi)

5m 22s

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