Dow Jones: The European Union may import "significantly more" biofuels than originally thought under a proposal to add them to transport fuel, an E.U. official said Wednesday, as import tariffs won’t be high enough to dissuade the world’s main exporters. The European Commission’s proposal, which would require 10% of each country’s transport fuel to come from biofuels by 2020, is supposed to cut so-called ‘greenhouse gas’ emissions from cars and reduce the continent’s reliance on …