Oil is good and bad. Its good because it helps our energy needs. Its bad because it causes pollution. Oil is a fossil fuel. Burning it produces carbon dioxide (CO2). This is one of the biggest causes of global warming. There isnt much oil left in the

发表于:2018-12-28 / 阅读(78) / 评论(0) 分类 听一分钟英文-O

Narrator: Exercise 3.9. Lecture 3: Electric cars? Solar-powered buses? When most people imagine solutions to the problems of city air pollution they probably think of electricity and solar power. But the problem with an electric car is that the elect

发表于:2018-12-30 / 阅读(80) / 评论(0) 分类 202 Useful Exercises for IELTS

SCIENCE REPORT — February 7, 2002: Fuel Cell Cars By Mario Ritter This is the VOA Special English SCIENCE REPORT. The United States Secretary of Energy, Spencer Abraham, has announced a program to d

发表于:2019-01-02 / 阅读(47) / 评论(0) 分类 科技之光

This is the VOA Special English Development Report. A hydrogen fuel cell powered bus in Hartford, Connecticut, in 2007. If you travel by bus in Sao Paulo, Brazil these days your vehicle may be powered by hydrogen fuel cells. The city's urban transpo

发表于:2019-01-11 / 阅读(40) / 评论(0) 分类 VOA慢速英语2009年(九)月

Oil is good and bad. Its good because it helps our energy needs. Its bad because it causes pollution. Oil is a fossil fuel. Burning it produces carbon dioxide (CO2). This is one of the biggest causes of global warming. There isnt much oil left in the

发表于:2019-01-21 / 阅读(46) / 评论(0) 分类 纯正英语一分钟

Bryan Wilson works to cut pollution from cookstoves, two-stroke engines, diesel Shelley Schlender | Fort Collins, Colorado 10 May 2010 Engineer Bryan Willson is developing cleaner-running, more energy-efficient products for people in the developing w

发表于:2019-02-05 / 阅读(27) / 评论(0) 分类 VOA标准英语2010年(五)月