As drought caused by warming reduces the land's ability to take in carbon, the result could be more carbon dioxide left in the atmosphere, and thus more warming, Zhao Maosheng from the University of Montana explained in a telephone interview.

　　“This is a pretty serious warning that warmer temperatures are not going to endlessly improve plant growth，”co­author Steven Running, also from the University of Montana, said in a statement.“We see this as a bit of a surprise, and potentially significant on a policy level because previous interpretations suggested global warming might actually help plant growth around the world，”he said.

　　Instead, he and Zhao found a small but measurable decline of about 1%, compared to a 6% increase in the past decade.

　　Their study, based on the data collected by NASA satellites, found that north areas continued to increase plant growth, thanks to warmer temperatures and a longer growing season.

　　Someone commented，“This past decade's net decline in earthly productivity suggests that a complex relationship between temperature, rainfall, cloudiness, and carbon dioxide，probably in combination with other factors such as nutrients and land management, will determine future patterns and trends in productivity.”

　　语篇解读：一项研究表明：气候温暖不能无止境地帮助植物生长，气候温暖所造成的干旱降低了土地对二氧化碳的吸收能力，结果使大气中的二氧化碳的含量不断上升。

【2017届高考英语一轮总复习精选测试题北师大版选修八Unit 22 A卷】相关文章：

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (31)

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修8 unit4《Pygmalion》

★ 2014届高考英语一轮复习课时作业(三十六)选修6Module 6《War and Peace》（外研版）

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（10）及答案

★ 2017届高考英语二轮复习课时训练：9（含解析）

★ 2014届高考英语一轮复习课时作业(二十五)必修5Module 1《British and American English》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修8 unit5《Meeting your ancestors》

★ 15-16高考英语二轮复习如何突破英语易错题

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之夹叙夹议文：体验真题（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (42)