根據「快用再生燃料聯盟」（Renewable Fuels Now Coalition）於2007年10月所做的民意調查，74%的受訪人認為應該增加使用國內生產的再生燃料，例如乙醇。
美國國家環保局估計，在2012年時，此標準將有助每年減少使用39億加侖石油，並減少一千三百萬噸的溫室氣體排放 - 相當於減少230萬輛汽車的碳排放。
The amount of ethanol and biodiesel Americans burn in their cars and trucks is increasing by law. The 2008 renewable fuels standard will be raised to 7.76 percent, nearly doubling the current standard of of 4.66 percent to comply with the new energy bill enacted late last year. The increase is in response to the Energy Independence and Security Act, which President George W. Bush signed in December.
Last November, the U.S. Environmental Protection Agency, EPA, announced a renewable fuels standard of 4.66 percent based on previous law that mandated at least 5.4 billion gallons of renewable fuels be blended into the nation's transportation fuels this year.
But now the EPA is raising the standard to 7.76 percent to comply with the new minimum of 9.0 billion gallons of renewable fuel that the Energy Independence and Security Act requires.
The act increases the overall volume of renewable fuels that must be blended each year, reaching 36 billion gallons in 2022.
To achieve these volumes, EPA annually calculates the percentage-based standard, which applies to refiners, importers and non-oxygenate blenders of gasoline. Based on the standard, each of these parties determines the minimum volume of renewable fuel that it must use.
About half of the gasoline used today in the United States is blended with ethanol at levels of up to 10 percent by volume, called E10. Ethanol blends at higher volumes, such as 85 percent, or E85, are available in some areas for use in flexible-fuel vehicles.
According to a national poll released in October 2007 by the Renewable Fuels Now Coalition, 74 percent of Americans queried believe the use of domestically produced renewable fuels like ethanol should be increased.
"By overwhelming margins, Americans want renewable fuels like ethanol to play a larger role in our nation's energy future," said Renewable Fuels Association President Bob Dinneen, a member of the Renewable Fuels Now Coalition. "The consequences of continuing our dependence on foreign oil are unacceptable.
Renewable fuels like ethanol offer our nation an opportunity to go in a new, more sustainable energy direction."
The EPA estimates that the renewable fuels standard program will cut petroleum use by up to 3.9 billion gallons and greenhouse gas emissions by up to 13.1 million metric tons annually by 2012 - the equivalent of eliminating the greenhouse-gas emissions of 2.3 million cars.
But some environmentalists are resisting renewable fuels, saying that ethanol fueled cars are less efficient and using current technologies can even produce more global warming emissions than gasoline fueled cars. "The corn that goes into ethanol takes massive amounts of energy, water, and land to produce, and using it for fuel could take away food from the world's poorest peoples," says Co-op America in a recent letter-writing campaign to Congress.
To avoid the food-fuel controversy, some view cellulosic ethanol made from non-food crops as the best option. Possible feedstocks include cattle manure, yard waste, logging slash, switchgrass, even scrap tires.