Soil erosion is greater when

During the past century,the temperature of the Earth has increased by: (in $^{\circ}C$)

Polyblend is mixed with ...$A$... to lay roads in ...$B$.... Complete the given statement by choosing the appropriate option for $A$ and $B$.

Consider the following statements about eutrophication:
$I.$ Eutrophication is the natural ageing of a water body by nutrient enrichment.
$II.$ The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or accelerated eutrophication.
$III.$ The plant nutrients responsible for eutrophication are nitrates and phosphates.
$IV.$ Phosphates and nitrates accelerate the growth of algae which utilize oxygen and may deoxygenate the water enough to kill the fish and other aquatic animals.
Which of the statements given above are correct?

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

For which major rivers in India has the Ministry of Environment formulated an action plan?