Which of these is the lightest?

Bioremediation may NOT be most ideal for the removal of which of the following from a site?

Consider the following Black carbon.

1) It is formed through the incomplete combustion of fossil fuels.

2) Its particles absorb heat but are extremely short-lived in the atmosphere in comparison to carbon dioxide.

3) If deposited on snow, it could accelerate the heating of snow.

Select the correct answer using the codes below.

Water can be considered polluted due to

1) High concentration of nutrients

2) Higher temperature

3) Presence of larvae eating fish

Select the correct answer using the codes below.

Tamil Nadu govt in collaboration with IIT Madras has been restoring Vaan Island in Gulf of Mannar by deploying