New research reveals that a key biological carbon pump is weakening, threatening ecosystems and the climate.

By Bob Berwyn

Pictures of Earth from outer space often show the planet as a gaudy quilt. Shimmering aquamarine water covers more than 70 percent of its surface and those hues often seem to signify life against the vast darkness of the universe. But new research analyzing satellite images of the planet over a span of more than 20 years found that one shade of ocean green, representing chlorophyll produced by phytoplankton, is fading.

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