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简介：
When people talk about air pollution, they are usually thinking about outdoor air ____ But do you know that there is also air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have ____ to do with polluted indoor air.
A lot of pollution comes from indoor activities ____ smoking and cooking. As most people ____ about 80%-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.
Air pollution influences our health _____ When the air is polluted, not only young children and old people ____ from it,________ people with
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