Capturing heat-trapping CO_2 and storing it underground may help slow global warming. But plans so far have focused on scrubbing CO_2 from power plant stacks, which account for only half of all emissions. Now, a few scientists hope to catch at least some of the other half—which puffs out of tailpipes, homes, and other nonpoint sources—directly from the air.rnNew research published in ES&T (pp 7558-7563) suggests that it may be feasible to suck CO_2 out of the atmosphere using relatively straightforward technology, similar to that currently used by pulp and paper mills.
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