Environmentalists and industry clashed on Tuesday over plans by the European Commission to set new limits on car emissions, which auto manufacturers called too costly and activists said were too lax... [The] European Automobile Manufacturers Association (ACEA), a lobby group, said the [target] figure was still too high and not the most cost-effective way to curb climate change... ACEA represents manufacturers including BMW, DaimlerChrysler, Porsche, Fiat and Renault.