EU Auto Makers Brace for Tougher Air-Quality Rule

LONDON – European auto makers, already pushed to the brink with upcoming government directives on the amount of carbon dioxide per gram vehicle engines can spew, are questioning how many more technical demands can be made on combustion engines.

The European Union Council of Ministers recently agreed in principal to a binding limit of fine particles in ambient air of 25 micrograms per cubit meters to take effect in 2015. The PM2.5 directive replaces a non-binding target, which was ...