cars and earth
nowadays, with the living standards improving fast, masses of people own cars,which certainly benefit them a lot. however,more and more cars will give out poisonous gases and cause air pollution . as a result , the worse environment comes into being .
therefore, human beings are faced with an urgent task to take measures to save the earth. what's the most important is that the government should pass laws and limit the number of cars. in addition/besides /what's more ， we must use environmently friendly cars so as to reduce the pollution.
after all,we have only one earth. if we continue polluting it,we shall be punished in time. thus it is important that we should make proper use of cars and protect our earth./thus it is important for us to make proper use of cars and protect our earth.