Business Green: The world is choking on carbon. We’re entering an energy-constrained economy as consumers and businesses alike begin to wonder where their next electron is coming from. No wonder, then, that French company EDF recently agreed to take over the British nuclear industry by purchasing British Energy for £12.5bn. The purchase gives it access to all but two of the country’s nuclear power plants, which will in any case shut down in 2010. The government has touted the purchase as part …