Ramesh Chandra Dagar includes . . . . . . for case study of organic farming.

What human activities are responsible for the increase in the amount of $CO_2$ in the atmosphere?

Which one of the following is a wrong statement?

Pollution is controlled by which of the following?

Eutrophication is observed in ...... .

List all the wastes that you generate at home,school,or during your trips to other places. Which could you very easily reduce? Which would be difficult or rather impossible to reduce?