EPA suggests tougher soot-pollution standards; not all are pleased

EPA suggests tougher soot-pollution standards; not all are pleased
http://www.latimes.com/news/nation/nationnow/la-na-nn-epa-soot-regulation-20120615,0,5672913.story

"The Obama administration has proposed tougher standards on the amount of soot that can be released into the air, a move required by the courts but one that raised the ire of some businesses and Republicans in an election year."