A great video lecture conducted by experienced biology teacher on 12th class biology chapter 27 topic1 pollution. Get full understanding or ask any questions.
Pollution, ch 27, lec 3, Pollution - Inter Part 2 Biology
13:38
Deforestation and Afforestation, ch 27, lec 3, Pollution - Inter Part 2 Biology
4:35
Define Pollution, ch 27, lec 3, Pollution - Inter Part 2 Biology
4:04
Acid Rain, ch 27, lec 3, Pollution - Inter Part 2 Biology
2:51
Industrial Effluents, ch 27, lec 3, Pollution - Inter Part 2 Biology
2:54
