The European Union has tightened a cap on carbon dioxide emissions from cars, ending a skirmish with Germany through a compromise that eases the potential costs for automakers.The European Parliament voted today in Strasbourg, France, to cut average car-CO2 emissions to 95 grams a kilometer in 2021 through varying targets for individual manufacturers, according to a statement. Current EU rules cap auto discharges at 130 grams a kilometer on average as of 2015 and set a non-binding goal of 95 grams for 2020.