But she says the research does show the need to study whether or not there are long-lasting effects of repeated exposure over several years.

VOA: special.2011.03.02

Nienke Beintema from the Washington-based International Food Policy Research Institute led the study.

VOA: special.2011.05.03

They can also do research. College students can earn work-study credits.

VOA: special.2009.07.27

Kristine Funk's study on Web-based weight loss management is published in the Journal of Medical Internet Research.

VOA: standard.2010.07.30

Researcher Katariina Kallio of the University of Turku in Finland says her study on teenagers extends previous research, which found cardiovascular damage in grown-ups who breathed in other peoples' smoke.

VOA: standard.2010.03.04