Reuters: The European Union’s executive Commission will link “before December 2008 at the latest” an EU market in carbon emissions permits with a related U.N.-run trading scheme, it said in a statement on Wednesday. An EU source told Reuters a firm date may be announced this week. “Possibly at some point this week…we’ll issue details of a precise date,” the source said. The EU’s flagship scheme to combat climate change allows heavy industry a fixed quota of permits to emit the main …