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Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel

Green Car Congress

In 2005, their sales increased even further, accounting for approximately 54% of all new car sales. 80.27, “high ozone season” means the period from June 1 to September 15 of any calendar year and “regulatory control period” means the period from May 1 to September 15 of any calendar year. 40 CFR § 80.27 Pursuant to 40 CFR § 80.27(a)(2):