1.  With the technology development, greener cars will be produced, which means there will be a gradual move to electric and gas-powered cars.

2.  Now some environmentfriendly cars have been produced such as the Twingo and the SmILE.

3.  As more and more cars are produced and run in the street, a large volume of poisonous gas will be given off, polluting the atmosphere and causing actual harm to the health of people.

4.  Thirdly, scientists and car corporation have already produced some wonderful cars which can meet the levels such as Twingo SmILE.

5.  And it suggests that we have the techniques to produce the cars on a large-scale.

6.  Firstly, as more and more cars are produced and run in the street, a large volume of poisonous gas will be given off, polluting the atmosphere and causing actual harm to the health of people.

7.  Benefit from the reform and opening-up policy, economy and industry have become prosperous so more and more cars are produced and more and more family have the ability to buy a private car.

8.  Producing cars runs out of our limited natural resources and vehicle emissions lead to terrible air pollution, which goes against the low-carbon concept.

9.  When Henry Ford produced his first cars they were only available in one color, black.

10.  Also, with the rapid development of economy and technology, steel and iron industry has fastened its step to produce cars, motorcycles, and so on, which do much harm to the environment.