Exposure to air pollution during pregnancy raises the odds of having low-birth-weight babies, an international study has found.img width='1' height='1' src='http://rss.nytimes.com/c/34625/f/640346/s/2876b1f9/mf.gif' border='0'/br/br/a href="http://da.feedsportal.com/r/151885475123/u/0/f/640346/c/34625/s/2876b1f9/a2.htm"img src="http://da.feedsportal.com/r/151885475123/u/0/f/640346/c/34625/s/2876b1f9/a2.img" border="0"//aimg width="1" height="1" src="http://pi.feedsportal.com/r/151885475123/u/0/f/640346/c/34625/s/2876b1f9/a2t.img" border="0"/