Ladies and gentlemen,I return to this year in a time machine .In the year 2500,we are able to travel

题目

Ladies and gentlemen,I return to this year in a time machine .In the year 2500,we are able to travel through time to any year in the history of the earth. This year is your last chance to change your lifestyle to save the earth.
Beginning in the middle of 20th century ,a few people were worried about polluting the earth’s water and air ,but most people did not change their ways of life .Instead, they continued to pour dangerous chemicals and other wastes into lakes and seas, to drive more and more cars and trucks, and to cut down trees.
By the year of 2200,the earth’s water was completely polluted. People could no longer drink water, and they had to use other types of liquids. Scientist said that in the future there will be too many people on the earth But not enough was done
So ,by the year of 2300,there were so many people that food became scare .There was no water to grow food and all of the fishes in the lakes and seas died because of pollution. Terrible wars（战争）

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