Japan to go E10 by 2030

The Japanese government will shortly enact a law that requires all gasoline-using vehicles in the country be capable of using E10 by the year 2030. This is part of the country's compliance to the Kyoto Protocol to reduce CO2 emissions by six percent by 2012.
E10 is a blend of 10 percent ethanol and 90 percent gasoline. I've got to admit I'm scratching my head on this one. Isn't fuel sold in the U.S. required to use 10 percent ethanol? If this is the case, what took Japan, usually considered environmentally conscious, so long?

[Source: Asahi Shimbun via United Press International via Monsters and Critics]

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