In $2002$,the World Summit on Sustainable Development was held in which of the following places?

Who is concerned with organic farming?

Which radiations reaching the Earth's surface are absorbed by the gases present in the Earth's atmosphere?

The Ministry of Environment and Forest has initiated the Ganga Action Plan and Yamuna Action Plan:
$(i)$ To save these major rivers of our country from pollution.
$(ii)$ It is proposed to build a large number of sewage treatment plants.
$(iii)$ Under these plans,only treated sewage may be discharged into the rivers.

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

Which of the following is $NOT$ present in photochemical smog?