Snow blindness is caused by

$dB$ is a standard abbreviation used for the quantitative expression of

$BOD$ of polluted water is estimated by measuring the amount of . . . . . . .

The addition of elements like nitrogen and phosphorus to a lake through streams leads to:

Which of the following is responsible for the thinning of eggshells in birds?

$A$: Nitrate and phosphate discharge in a water body causes eutrophication.
$R$: This increases the inorganic content in the water body and hence the growth of algal blooms.