Na mbụ, na ihu igwe na-aga n'ihu n'ọtụtụ akụkụ nke mba ahụ, "PM2.5" aghọwo okwu kacha ewu ewu na sayensị.Isi ihe kpatara "mgbawa" nke PM2.5 uru oge a bụ nnukwu ihe ọkụkụ nke sọlfọ dioxide, nitrogen oxides na uzuzu sitere na ọkụ ọkụ.Dị ka otu n'ime ...
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