How much do you know about air pollution? When people talk about air pollution, they usually think about outdoor air 1. But do you know that there is also 2 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 something to do with 3 indoor air.
A lot of pollution comes from 4 activities such as smoking and cooking. As most people 5 about 80％-90％of their time inside buildings, it is important to take indoor air pollution seriously too.
Air pollution influences our health in many ways. When the air is polluted, not only 6 children and old people suffer from it, but people with 7 problems suffer as well. Indoor air pollution can 8 people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer and heart disease! In the Great Smog of London in 1952, 4,000 9 died in a few days because of the pollution! It is 10 that half a million young children and women die each year in India because of indoor air pollution!
