大学体验英语3 frog story.ppt

Tips: breathing difficulty, traffic jams, communication failure, horrible view, ... Ex. 10. Look at the pictures below and talk about the causes and effects of the natural disasters with the help of the tips given. The sandstorm is a horrible phenomenon. The clouds of dust are so heavy that you can hardly breathe. It is so dark that it may cause traffic accidents. Reference: Tips: crops losses, food / water shortages, ... Ex. 10. Look at the pictures below and talk about the causes and effects of the natural disasters with the help of the tips given. Reference Tips: crops losses, food / water shortages, ... Ex. 10. Look at the pictures below and talk about the causes and effects of the natural disasters with the help of the tips given. Droughts result from lack of water, which is essential for plants and animals. The failure of crops leads to food shortage, and sometimes even famine. Reference: Tips: life and property losses, homeless, diseases, ... Ex. 10. Look at the pictures below and talk about the causes and effects of the natural disasters with the help of the tips given. Reference Tips: life and property losses, homeless, diseases, ... Ex. 10. Look at the pictures below and talk about the causes and effects of the natural disasters with the help of the tips given. The flood washes away houses, destroys fields, and causes life and property losses. People may be left homeless and suffer diseases. Reference: Tips: population growth, deforestation, over-cultivation, pollution, global warming, imbalance of the ecosystem, ... Reference Tips: population growth, deforestation, over-cultivation, pollution, global warming, imbalance of the ecosystem, ... The increase of disasters is mainly caused by human activities. With the growth of population, we need more resources from the Earth. Deforestation, over-cultivation, together with other factors, lead to the imbalance of the ecosystem. And this in turn causes more natural disasters. Reference: Ex. 11. Read the sample