该报告还详细介绍了一些鲜为人知的呼吸道疾病死亡病因：炉灶、火灾和二手烟引起的室内空气污染。
The report also details a little-discussed cause of respiratory death — indoor air pollution from cooking stoves, fires and secondhand cigarette smoke.
我们常常将空气污染与烟囱和汽车联系在一起，但事实上火山、森林火灾、沙暴、沼泽、海洋和植物都会带来一些我们认为是大气污染物的化学物质。
We normally associate air pollution with smokestacks and cars, but volcanoes, forest fires, dust storms, marshes, oceans, and plants also add to the air chemicals we consider pollutants.
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