In a pristine white greenhouse in La Jolla, Calif., maverick molecular biologist Craig Venter is showing off tubs of dark green goop that might help rescue the planet.
Winter sunlight streams through the glass roof onto rows of long, white troughs filled with algae and seawater. A little water wheel in each trough turns to keep the liquid circulating and the growing cells evenly exposed to light and to carbon dioxide-enriched air. Computers maintain a constant temperature. Giant transparent bags of algae varieties waiting to be tested hang from metal beams.
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