Anewstudylinksheavyairpollutionfromcoalburningtoshorter...
问题详情:AnewstudylinksheavyairpollutionfromcoalburningtoshorterlivesinnorthernChina.Researchersestimatethatthehalf-billionpeoplealivethereinthe1990swillliveanaverageof5yearslessthantheirsoutherncounte...