Word: ecologists
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Dates: during 2010-2019
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...their carbon emissions to developing nations through global trade - by importing goods and services from abroad - thereby shrinking their carbon footprints while inflating those of major exporting nations like China. "It's surprising just how much this effect is driven by the U.S. and China," says Steven Davis, an ecologist at the Carnegie Institution and the lead author of the PNAS paper. "It is significant." (See the top 10 green ideas...
...extra tons of mass per acre per year, by the end of the study - the equivalent of a single two-foot-diameter tree, if you could grow a tree that big in a year. "We don't know exactly when it started," says co-author Geoffrey Parker, a forest ecologist at the Smithsonian. But the scientists do have an idea of the reason - or rather, three possible reasons, all of which are likely to be interrelated...