Reuters: A European Union plan to label tar sands oil as highly polluting in its fight against climate change has been abandoned after years of opposition led by major producer Canada. A proposal published by the European Commission on Tuesday removes an obstacle to Canada exporting tar sands crude to Europe and comes at a time when tensions between the EU and top oil supplier Russia are running high. EU sources, speaking on condition of anonymity, said the desire for a trade deal with Canada had been a...