step_by_step3000第三册unit2答案及原文VIP专享VIP免费

Unit 2 Earth and Environment Part 1 Warming up A 1. ...impact of climate change … damage to crops … worse ... 2. ...2000 delegates … northern Brazil … third United Nations Conference on Desertification. 3. ...A huge oil spill … Mexico, ... 4. Wildfires … Florida … contained … a week ... 5. ... Greenland is melting around the edges … 50 cubic kilometers … raise global sea level ... B 1. It attempts to balance environmental concerns and the needs of the community. 2. Reptile species are in greater trouble than amphibian species. 3. A new approach in the fight against the illegal drugs trade. 4. One in every eight species of plants is threatened with extinction. 5. A new local directory for the environmentally-aware, called the “Boulder County Green Pages”. Tapescripts: 1. Australia is the world’s driest continent. There’s general agreement that the country has to use water more efficiently. In many part supplies are in crisis. At a meeting in Canberra, the Council of Australian Governments has approved national water plan. It attempts to balance environmental concerns and the needs of the community. The amount of water taken from rivers for commercial use is to be cut and farmers will be compensated. 2. The disappearance and deformity of amphibians such as frogs and salamanders from rain forests and mountain lakes worldwide has attracted wide-spread scientific attention over the last decade. Now a new study says reptile species including turtles, snakes, and alligators are in even greater trouble. Twice as many reptiles as amphibians, or some 100 species, are currently listed as endangered by the World Conservation Union. The study says habitat loss and degradation, pollution, ...