Ecosanitation is

Ruthless exploitation and pollution of the environment has increased the magnitude of waste materials,which has disturbed the operations of all important:

Match the following columns:

Column-$I$	Column-$II$
$(p)$ Catalytic converter	$(i)$ Foam
$(q)$ Marsh land	$(ii)$ Powder of plastic
$(r)$ Polyblend	$(iii)$ Air pollution
$(s)$ Elnino effect	$(iv)$ Deforestation
$(t)$ Chipko movement	$(v)$ Green House effect

Consider the following statements about Ramesh Chandra Dagar's work in the field of organic farming:
$I.$ Ramesh Chandra Dagar's work includes bee-keeping,dairy management,water harvesting,composting,and agriculture in a chain of processes.
$II.$ In this process,there is no need to use chemical fertilisers for crops as cattle excreta is used as manure.
$III.$ Crop waste is used for making compost,which is used as natural fertilizer.
$IV.$ Compost generates natural gas,which is used for the energy needs of the farm.
Which of the statements given above are correct?

Photochemical smog formed in congested metropolitan cities mainly consists of

Select the incorrect statement$(s)$ from the following.