TAKEN FROM THE ABOVE CITED ARTICLE:
Of course, the study author acknowledges that such a quick and monumental shift to plant-based fuels is next to impossible.
Jacobson's study troubles some environmentalists, even those who work with him. Roland Hwang of the Natural Resources Defense Council, said that ethanol, which cuts one of the key ingredients of smog and produces fewer greenhouse gases, is an important part of reducing all kinds of air pollution.
Jacobson's conclusion "is a provocative concept that is not workable," said Hwang, an engineer who used to work for California's state pollution control agency. "There's nothing in here that means we should throw away ethanol."
While praising Jacobson as one of the top atmospheric chemists in the nation, Hwang said he had problems with some of Jacobson's assumptions, such as an entire switch to ethanol by 2020. Also, he said that the ozone difference that Jacobson finds is so small that it may be in the margin of error of calculations.
Jacobson is also ignoring that ethanol - especially the kind made from cellulose, like switchgrass - reduces greenhouse gases, which cause global warming. And global warming will increase smog and smog-related deaths, an international scientific panel just found this month, Hwang said.
You can find an argument for or against anything, even from some apparently reputable persons.
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