人教选修6 Unit 4Global Warming学案1 知识网络图语言探究类别新课标要求掌握的项目话题Talk about global warming重点单词energy, light(v.), heat(v.), renewable, non-renewable, compare, phenomenon, graph, fuel, trap, data, climate, catastrophe, consequence, range, per, glance, concern ，amount重点短语run out, compare to, come about, fierce debate, result in, build up, keep on, on the other hand，even if ，make a difference，on the whole，put up with, as long as重点句型1.What do you think green house gases do?2. There is no doubt that….3.Without the ‘green house effect’，the earth would be about thirty-three degrees Celsius cooler than it is.4. Some byproducts of this process are called “greenhouse” gases, the most important one being carbon dioxide.语法强调句结构功能句式agreement & disagreement; blame and complaint.作文write a composition on environmental problems学能目标Learn some information about global warming .Know how to use “it” for emphasis.技能目标Practise expressing agreement & disagreement and giving blame and complaint.Learn about the usage of “it” for emphasis. 自主探究Get Blueprints For a Green HouseReducing your impact on the earth is not just a question of what you drive but also of what you live in. Residential energy use accounts for 16% of greenhouse-gas emissions. If you begin thinking green at the blueprint stage, however, low-tech, pragmatic techniques will maximize your new home's efficiency. Installing those systems from the ground up is cheaper than retrofitting. "Doing simple things could drastically reduce your energy costs, by 40%," says Oru Bose, a sustainable-design architect in Santa Fe, N.M. For example, control heat, air and moisture leakage by sealing windows and doors. Insulate the garage, attic and basement with natural, nontoxic materials like reclaimed blue jeans. Protect windows from sunrays with large overhangs and double-pane glass. Emphasize natural cross ventilation. "You don't need to have 24th century solutions to solve 18th century problems," Bose says. Next, consider renewable energy sources like solar electric systems, compact wind turbines and geothermal heat pumps to help power your home. When you're ready to get creative, GreenHomeGuide.com will help you find bamboo flooring, cork tiles, and countertops made from recycled wastepaper.转载自：http://www.time.com/time/specials/2007/environment/article/0,28804,1602354_1603074_1603092,00.html
