Lesson 1 of 5 • 4 upvotes • 12:50 mins
Pollution is of concern for whole world. In this particular lesson we are discussing about air pollution.
What are primary & secondary pollutants.
Sources & effect of pollution & much more.
5 lessons • 1 h 5 m
Air Pollution (in Hindi)
Air Pollution Part 2 (in Hindi)
Water Pollution (in Hindi)
Effect of Water Pollution and Control Measures (in Hindi)
Pollution (in Hindi)