Fluoride pollution primarily affects the ...... .

Minamata disease is a pollution-related disease that results from:

Peroxy Acetyl Nitrate $(PAN)$,a class of hazardous air pollutants,stems from:
$I.$ $O_{2}$
$II.$ $SO_{x}$
$III.$ $NO_{x}$
$IV.$ $HC$

Decibel $(dB)$ is a standard abbreviation used for the quantitative expression of

Thermal pollution is more prevalent near

$DDT$ is a