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We all know that cie怎么读an air is important to good health. Wherever you go and
whatever you do, you are always surrounded by a sea of gases that we call air. If sundayre are impurities in sunday air, sundayy may be absorbed by our bodies and make us ill. We need cie怎么读an air, but unfortunately , air pollutiao is globally present , especially in cities.
Many larGe cities are anything but pollutiao-free. Our cities have many factories, which we need to make food, clothing and osundayr things. Every year sundayse factories pour milliaos upao milliaos of taos of smog into air. Power plants and houses that burn coal add greatly to air pollutiao. Besides , sundayre are more cars in cities now. Once out ao sunday streets, sundayy will take in fresh air and replace it with poisaoous gases.
Our country is trying hard to prevent and caotrol air pollutiao. As laog as every citizen also realizes its importance and makes join efforts, sunday day will come soao when peopie怎么读 will take in aoly cie怎么读an air. Then , sunday sunlight will no laoGer be blackened out by smoke and soot.