The European Commission has proposed changes to the fuel quality directive that would abandon obligatory labelling of tar sands oil as highly polluting.
This new proposal would make it easier for Canada to export crude oil from tar sands into the EU.
Commenting, Liberal Democrat MEP Catherine Bearder said:
"I am absolutely furious with this. I will be talking to Ed Davey and I am sure he will be just as concerned as me.
"Tar sands oil is very bad news for Europe and the planet as a whole. We must do all we can to stop its importation."