“If you replaced all the diesel(柴油) in the U．S. with soy biodiesel, it would take half the land mass of the U．S. to grow those soybeans，” says Matt Caspari, chief executive of Aurora Biofuels, a Berkeley, Calif-based private firm that specializes in algae oil technology. On the other hand, the Energy Department says that if algae fuel replaced all the petroleum fuel in the United States, it would require 15,000 square miles, which is a few thousand miles larger than Maryland (12,407 square miles), the 42nd state in land area.

　　Another bonus: Because algae can be grown just about anywhere in a closed space, they're being tested at several power plants across the nation as a carbon absorber. Smokestack emissions (烟囱排放物) can be pumped directly into the ponds, feeding the algae while keeping greenhouse gases out of the atmosphere.

　　Although processing technology for algae fuel－also known as “oilgae” in some environmentalist circles—is improving, it's still years away from reaching your local gas pump. “It's just a question of cost, because no large-cale facilities have been built yet，” Caspari says.

　　1. The underlined word “yield” in Paragraph 2 can be replaced by ________.

　　A. control

　　B. require

　　C. produce

　　D. grow

　　2. Compared with corn and soybeans, algae________.

　　A. may pollute water and soil

【2017届高考英语二轮专题总复习 阅读能力培养精品系列（五十）】相关文章：

★ 2014届高考英语一轮复习必修1参考答案（外研版）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：体验真题（含解析）

★ 江苏省扬州市2014高考英语一轮 阅读理解暑假练习题（10）

★ 2017届高考英语二轮专题总复习 阅读能力培养精品系列（五十一）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (57)

★ 2017届高考英语二轮专题总复习 阅读能力培养精品系列（五十四）

★ 2017届高考英语二轮专题总复习 阅读能力培养精品系列（五十五）

★ 2017届高考英语二轮专题总复习 阅读能力培养精品系列（二十五）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (2)

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