In their study, the researchers tested blood for cotinine,a chemical which is produced when nicotine is metabolized, so they got an objective measure of how much smoke the teenagers were exposed to.

VOA: standard.2010.03.04

Republican Jeb Hensarling says changes agreed to by Democrats and Republicans have improved the measure,adding that it should attract strong bipartisan support when it comes up for a vote in the House.

VOA: standard.2009.04.28