Wall Street Journal: Spain–European Union countries are struggling to agree on a target for reducing greenhouse-gas emissions ahead of a Jan. 31 deadline to deliver a concrete offer to the United Nations following the Copenhagen accord. France, Germany, the U.K. and Spain said they favor adopting a more-ambitious target to reduce emissions to 30% below 1990 levels by 2020, compared with the 20% target the EU is already committed to–if others were to match that offer. But EU Environment …