Where are Ecosan toilets used?

The second commitment period for the Kyoto Protocol was decided at

Which of the following human activities is responsible for desertification?

Identify the correct statements from the following:
$(i)$ $DDT$ is non-biodegradable.
$(ii)$ Heavy metals are responsible for biomagnification.
$(iii)$ High concentration of $DDT$ disturbs calcium metabolism in birds.
$(iv)$ The concentration of $DDT$ in large fish can be up to $2 \, ppm$.

$Ahmed \text{ } Khan : \text{polyblend} :: \text{Amrita Devi Bishnoi} :$

Loss of forest,urbanization,and increasing pollution are all due to: