The pollutants emitted by jet aeroplanes in the outer atmosphere,such as fluorocarbons,are known as:

Which one of the following pesticides is banned nowadays?

What does snow-blindness refer to?

Define and explain the concept of Biological Magnification.

The maximum biological magnification of $DDT$ through the food web is seen in:

Select the correct option regarding algal bloom.
$I-$ Excessive growth of planktonic algae occurs due to the presence of high amounts of nutrients in water bodies.
$II-$ Algal bloom imparts a distinct color to the water bodies.
$III-$ Algal bloom causes deterioration of water quality and fish mortality.
$IV-$ All bloom-forming algae are highly toxic to humans and animals.