What percentage of the total atmosphere is occupied by the homosphere?

What is green chemistry?

The stratosphere extends from sea level up to an altitude of $...$ kilometers.

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:

Which of the following statements is not correct?

$CF_xCly$ [where $x + y = 4$] compounds are not useful because .....