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Diatoms in the world's oceans exhale more oxygen than all the world's rainforests. These tiny drifting algae generate about 20 percent of the oxygen produced on Earth each year, and invisibly recycle gases enveloping our planet. How diatoms respond to rising carbon dioxide levels is still unknown. A new study finds the genetic ways that a common species of diatom adjusts to sudden and long-term increases in carbon dioxide. [Source: University of Washington]
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