The would's population reached 5.3 billion in 1990 and is expected to grow by another one billion to reach 6.3 billion by 2000. About 93 percent of this growth will be in the developing countries. Population is a serious problem in the developimg countried. Because the condition of that countries are not great to survive. Therefore, we should try to control population and find some ways to produce food.
The number of living species on earth is estimated at up to 80million, but only 12.4milliom have been briefly described; 25 percent of them are at risk of extinction during the next 20 to 30 years. We should protect Mother Nature from cutting trees, hunting animals and producing garbages. We can reverve cretures' DNA to produce more and more.
I think we should do something to protect wildlife. We can live in the city and create habitat in your backyard. Besides, we must work together to reduce our energy consumption. This is vital to stopping vlimate change and global warming. If each couple limited themselvea to no more than 2 children, our world's population could steady.
Saturday, 3 January 2009
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