Word: grow
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Dates: during 2010-2019
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Basic biology suggests that plants might grow faster in a world with more carbon dioxide, and field experiments bear that out: when you pump extra CO2 into a field or a forest, trees and other vegetation tend to get bigger...
...Center, in Edgewater, Md., to show that their growth has accelerated significantly. On average, the stands were expanding at a rate of two 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...
Forest biologists already know that, all things being equal, trees grow more rapidly when they're young, then taper off as they mature, and that you can chart the standard curve of growth for a given forest type by looking at the kind of snapshots Parker and his colleagues used. It takes only a couple of years of measurements to figure out the overall growth curve. This study has been going on for 22 years, conducted largely by technicians and volunteers trained by the Smithsonian scientists. "We have a huge corps of volunteers," says Parker. "It's not rocket science...
...station S.O.S. gives Haitians the opportunity to voice where they are and what they need. One man calls in and says he's from Delmas 83 and says that their area has yet to receive any aid. A story all too familiar, as growl of bellies in the streets grow louder...
None of their five cubs survived. That's partly why Tai Shan, the first cub to grow up in the U.S. capital, is so adored...