| http://www.w3.org/ns/prov#value | - ng EV advocate, there were just 20,546 plug-in hybrids and all-electric cars such as the Nissan Leaf sold in the first seven months of 2012, representing only 3.2 percent of total automobile sales for the year to date.EV boosters, like GM itself, point out that the Volt???s North American sales rose to a record 2,831 in August, and that plug-in car sales overall for the first eight months of 2012
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