the air pollution is very severe,
the smell is bad
the water of this school is also polluted, which infect the health of the teachers and students
the car loading pesticide pass by the gate of our school everyday, which is also a potential safety hazard.
希望我的回答能够让你满意，祝好。
农药残留 pesticide residue;
[例句]建立了测定食品中有机氯农药残留的气相色谱法。
A method for determination of organochlorine pesticide residues in food by gas chromatography was established.
