Ethanol as the Worst Form of Renewable Energy?

Mark Jacobson, professor of Civil and Environmental Engineering and director of the Atmosphere/Energy Program at Stanford University, recently conducted a study that ranked alternate energies from best to worst in terms of powering vehicles cleanly.

Ethanol was put to the test against, "Solar-photovoltaic (PV), concentrated solar power (CSP), wind, geothermal, hydroelectric, wave, tidal, nuclear, and coal with carbon capture and storage (CCS) technology."

After looking at reports of air pollutants from energy types on climate and air quality, and comparing how well each energy type was able to power vehicles, the study showed that ethanol came in dead last. Read: Is ethanol the Worst Form of Renewable Energy?

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