So much for GM's Green Revolution. Reuters reports that General Motors has suspended work on its $370 million Chevy Volt engine plant in Flint, Michigan and will source the engines from abroad until it figures out how to cut costs and restructure. Given that the Volt's batteries will come from Korea, it's unclear at this point what part of GM's electric car is actually going to be American. Before the automaker was pledged $13.4 billion in government loans, we heard a lot about how it would reinvent itself through clean tech. Could that just be more hot carbon dioxide?