News FocusAmerican Chemical Society Spring Meeting

Biofuels and City Air: A Marginal Effect

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Science  20 Apr 2012:
Vol. 336, Issue 6079, pp. 292-293
DOI: 10.1126/science.336.6079.292-b

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If drivers switch from gasoline to biofuels, will it lessen the air pollution that shrouds cities around the world? Studies of auto emissions have indicated it might. But the first citywide air quality study of its kind, reported at the meeting, suggests that unless more than 26% of cars make the switch, it will have negligible effect.