ys the smog didn't cover Beijing in 2013.РProblemРThe smog not only affects people's daily life, but also does harm to people's health. So more and more people have to go to see the doctor, quite a lot of flights have to be put off, a great number of people have to stay at home for fear of the poisonous air caused by the smog.РCausesРThe increase of cars in the city.РCausesРCarbon dioxide is widely considered to be a pollutant which associated with cars, planes and other human activities about burning of fossil fuels such as gasoline and natural gas.РMeasures to improve air quality? --- control the PM 2.5.РChange the factories' mode of production.?Reduce driving and flying.?Use new energy.?Governments should take measures to limit emissions of carbon dioxide and other poluted gases.РTHANKS
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