The EPA is cutting the soot level allowance from various sources by 20%. Reason im posting this is wood stoves were mentioned as one of the sources.
http://www.usatoday.com/story/news/nation/2012/12/14/epa-soot-pollution-rules/1767381/
http://www.usatoday.com/story/news/nation/2012/12/14/epa-soot-pollution-rules/1767381/