Iron versus climate change

Metal deposits can promote the growth of ocean algae that gobble greenhouse gas

By Roberta Kwok, 11:43 AM August 9, 2012

In 2004, a team of scientists traveled by ship to an enormous whirlpool in the ocean near Antarctica. Their goal was to find out if a risky strategy for fighting climate change might work. The plan: Dump iron in the water to trigger the growth of organisms called algae. Then let the algae soak up carbon dioxide, a gas that contributes to global warming. Finally, watch to see if the organisms drift to the seafloor.

This iron fertilization of algae appears to have been successful, an intern...

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