Nowadays, air pollution becomes a major topic in the society. PM 2.5 is a typical example, PM 2.5 is a kind of air pollution that has small dusts. Everyday, people search about air circumstances on the Internet.
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What cause the air pollution so grave?
People,factories and cars pollutes the air with harmful gases,machines produce gases and smoke...
How can we stop this?
In general, there are two ways of traveling, private cars and public transportation. We should regard public transportation as their first traveling option. Factories must meet standard requirements at all times...
Anyway,make great efforts to let air pollution be mitigated!
