The cause of water pollution is due to

Indiscriminate use of $DDT$ is undesirable because

The term 'Biosphere' refers to:

Mention two ways to prevent acid rain.

Which of the following statement$(s)$ is (are) incorrect reason for eutrophication?
$A$. excess usage of fertilisers
$B$. excess usage of detergents
$C$. dense plant population in water bodies
$D$. lack of nutrients in water bodies that prevent plant growth
Choose the most appropriate answer from the options given below:

The main cause of air pollution in large cities is ........