“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.”
1.From the first paragraph,we can learn________in the recent decade or so.
A.the emission of carbon hasn’t been reduced
B.drought has been causing loss of soil and water
C.carbon dioxide levels have been rising
D.the rise of temperature doesn’t promote the plant growth
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