about the protean weather

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these days,i found i can't make sure that what kind of clothes i should wear,for the weather changed so often. i live a mild city in china,but these years,the weather always be out of the way.i think its a result of the pollution of the earth. do you agree?but what can we do to improve the bad siuation,i alawys worried that if we don't carry out some items,we will not kown that when the last day to the earth will come!~