Environmental Pollution I read a piece of news recently. It says that in Japan marly businessmen ave selling fresh air to customers.and now it is becoming more and more popular. Why? --Fresh air is getting less and less in Japan, and so is it in the U. S. A. In fact, environmental pollution is a very serious problem the whol...
全球变暖-The Global WarmingThe Global WarmingPeople around the world may feel that the climate has been getting steadily warmer and warmer in recent years. Places which used to...
