Shanghai World Expo

The big news in green cars today will be the noon release of pricing and ordering information for the 2011 Chevrolet Volt, GM's upcoming range-extended compact electric car. But GM had more noteworthy news today, all the way from the other side of the world. General Motors, the company pilloried for "killing the electric car," is going to build a (very) small number of battery electric vehicles. So why is this significant? Because GM has been remorselessly touting the benefits of the Volt's range extender engine, which adds 300 more miles on gasoline to its 40-mile electric range. And because...