1→long-term effects: tác động lâu dài

2→natural resources :tài nguyên thiên nhiên

3→wastelands: nhũng vùng đát hoang

4→population:dân số

5→in danger of:có nguy cơ

The world's oceans are so vast that they can cope with the present levels of pollution. However, little is known about the long-term effects of such slow poisoning. The most serious problem of modern time is that man is destroying the Earth's natural resources and transforming huge areas into waste land. As a result, it is becoming extremely difficult to grow enough to feed the world's rapidly increasing population. A danger  of disappearing completely heal the face of the earth . The dangers , howerver are not confined sosely to the land and the sea . The smoke in the atmosphere, for example , is increasing so much that amount of sunlight has been reduced in many cities. Man's whole enviroment is being changed in serious way