Chairman Mao said: "Each solution carries its own problems"

"A computer model set up to simulate air quality in 2020 found that in some areas ozone levels would increase if all cars were run on bioethanol.
Deaths from respiratory problems and asthma attacks would increase with such levels, the researchers reported in Environmental Science and Technology. "We found that using E85 will cause at least as much health damage as gasoline, which already causes about 10,000 premature deaths annually from ozone and particulate matter," said Jacobson.
"The question is, if we're not getting any health benefits, then why continue to promote ethanol and other biofuels." "(Thanks Rania)