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

Clinton says preventing the exploitation and marginalization of girls is no longer an afterthought but a core foreign policy objective of the United States, which is co-sponsoring a Security Council resolution on the issue next week.

VOA: standard.2009.09.25