第三篇 监督自己！欢迎指点！
Topic: some people believe that the earth is being harmed by human activity. Others feel that human activity makes the earth a better place to live. What your opinion?
It’s an old saying goes, one coin has two sides. The technology today is developing so fast that a lot of invention bring us convenient. Some people believe human activity would surely improve the condition of our life, however the other claim that we have brought many damages to our earth. Personally, I agree the later one. We can just take car for example.
The increasing numbers of car would release a wide variety of harmful pollutants, including carbon dioxide, nitrogen oxides, sulfur oxides. These emissions will aggravate the problem of global warming, acid rain, worsen the air condition in the neighborhood.
For beginner, the burning of gas will bring carbon dioxide which would result the global warming. The increasing amounts of the pollutants raise the efficiency with which the air retains the sun's heat. This results in increases of global temperature. I still vividly remember the picture which is in An Inconvenient Truth, an Oscar-nominated film starring former United States President Al Gore as the narrator. The global warming will rise the see levels by melting the ice bergs at the Pole. Gore warms us that if the surface tempreture of our earth keeps growing, big coastal cities like New York and Shanghai will no longer exist in few years.
Furthermore, the particles which are released by the car is harmful for people's healthy. It give rise to a wide variety of respiratory diseases, such as asthma. My mother, who is a doctor, says that there are more and more people catch the disease which is a result of air pollution every year. And the car is the main cause for the dirty air.
In general, though cars bring us more convenient, it also result many environment problems. So the human activities indeed damaged our life in some levels.
