A. Observing Stars

　　B. Europe's First Dark Sky Park

　　C. The International Dark­Sky Association

　　D. Three Dark Sky Parks in the World

　　(4)(8 min.)

　　Electric cars are dirty. In fact, not only are they dirty, they might even be more dirty than their gasoline­powered cousins.

　　People in California love to talk about “zero­emissions vehicles”， but people in California seem to be clueless about where electricity comes from. Power plants mostly use fire to make it. Aside from the new folks who have their roofs covered with solar cells, we get our electricity from generators. Generators are fueled by something — usually coal, oil, but also by heat generated in nuclear power plants. There are a few wind farms and geothermal(地热的) plants as well, but by far we get electricity mainly by burning something.

　　In other words, those “zero­emissions” cars are likely coal­burning cars. It's just because the coal is burned somewhere else that it looks clean. It is not. It's as if the California Greens are covering their eyes — “If I can't see it, it's not happening.” Gasoline is an incredibly efficient way to power a vehicle; a gallon of gas has a lot of energy in it. But when you take that gas (or another fuel) and first use it to make electricity, you waste a nice part of that energy, mostly in the form of wasted heat — at the generator, through the transmission lines, etc.

【2016届牛津英语第二轮复习 限时训练 第19讲 细节理解题】相关文章：

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练十

★ 四点2015-2016高考英语第二轮复习建议

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (47)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (55)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (74)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (95)

★ 2017年高考英语二轮复习精品资料：专题14 阅读理解（押题专练）（原卷版）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 2017届高考英语二轮复习课时训练：5（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (51)