On Sunday, I with the help of the father, Internet checked the xian half a month before the air quality in March, a check, let me by surprise, I found the China heavy pollution has six days, light pollution has two days, there are seven days in moderate pollution.
We are living in such an environment, I asked my father: "fog and dust what a harm to human body?" Dad and I looked at the information online, it turns out that the dangers of smog and dust is very big, the fog haze will lead to the spread of infectious diseases and a variety of diseases, bring great harm to human body health. Dust can also harm to people's health, to the human travel a lot of inconvenience.
I have checked the cause of fog and dust, the original atmospheric air pressure is low, the air flow is not the main factors, air does not flow together, a tiny particles in the air, floating in the air, the air temperature is low, the ground, because of the large ground dust and vehicle is stirring up dust... Dust is a kind of the dangers of the interaction of wind and rain sand weather phenomenon, its formation and the earth greenhouse effect, vegetation destruction, species extinction, climate anomalies and other has an inseparable relationship. He also divided into dust, dust, dust...
I don't think we should be unrestrained exploitation of natural resources, and should not be random cut down trees, people have a car to drive less as far as possible, do more bus and ride a bike, green travel. Bulb use energy-saving lamps, less air conditioning, everyone will give more than street sprinkler. Don't throw rubbish everywhere, afforestation, protect our earth.
星期天，我在爸爸的幫助下，上網查了一下西安三月份前半個月的空氣質量，一查，讓我大吃一驚，我發現其中國重度污染有六天，輕度污染有兩天，中度污染有七天。
原來我們生活在這樣的環境下，我問爸爸：“霧霾和沙塵對人體有什麼危害嗎?”爸爸和我查閲了一下網上的'資料，原來，霧霾和沙塵的危害非常大，霧霾會導致傳染病擴散和多種疾病發生，給人體健康帶來較大的危害。沙塵也會危害到人們的身體健康，還給人類出行帶來很大的不便。
我又查了一下造成霧霾和沙塵的原因，原來大氣空氣氣壓低，空氣不流動是主要因素，空氣不流動是空氣中的微小顆粒聚集在一起，漂浮在空中，由於地面灰塵大，空氣温度低，地面的人和車輛是灰塵攪動起來……沙塵是一種風雨沙的相互作用的危害性天氣現象，它的形成與地球温室效應、植被破壞、物種滅絕、氣候異常等有着不可分割的關係。他還分為沙塵暴、浮塵、強沙塵……
我想我們不應該無節制開採自然資源，不應該隨意砍伐樹木，有車的人儘量少開車，多做公交車和騎自行車，綠色出行。燈泡儘量用節能燈，少開空調，大家要給街道多灑水。不隨地亂扔垃圾，多植樹造林，保護我們的地球。
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