Pesticides with very low biodegradation but strong affinity for fatty tissues are:

What is the ascending order of $BOD$ for the following: Sewage $(S)$,Paper mill effluent $(PE)$,Distillery effluent $(DE)$,and Sugar factory effluent $(SE)$?

Choose the correct option regarding integrated organic farming.

$LPG$ stands for Liquefied Petroleum Gas,which is primarily composed of propane and butane. What is the nature of $LPG$?

Match the items given in Column $I$ with those in Column $II$ and select the correct option given below:

Column $I$	Column $II$
$(a)$ Eutrophication	$(i)$ $UV-B$ radiation
$(b)$ Sanitary landfill	$(ii)$ Deforestation
$(c)$ Snow blindness	$(iii)$ Nutrient enrichment
$(d)$ Jhum cultivation	$(iv)$ Waste disposal

Select the correct year associated with the Chipko Movement.