In which country is ethanol used as a fuel in vehicles?

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

Which one of the following is a non-renewable exhaustible natural resource?

Which of the following does not occur when sewage is discharged into water bodies?

$A$ large number of fish suddenly die in a lake near a village. Which of the following could be the reason for this?
$(a)$ Excessive use of urea and phosphate fertilizers in nearby fields.
$(b)$ Spraying of $DDT$ in the entire area.
$(c)$ The lake water has turned green and murky.
$(d)$ The population of phytoplankton in the lake has decreased,reducing the photosynthetic capacity.
Which two of the above reasons are responsible?

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