WBZ-TV in Boston reports that infant obesity has risen more than 70 percent since 1980.  Researchers believe a common household chemical may be to blame for infant obesity. 

"Research has shown since 2001 that being exposed to BPA during development changes your body weight," said Tufts University scientist Dr. Laura Vandenberg.

BPA, or Bisphenol-A, is found in hundreds of consumer products.

"Humans are most likely exposed to BPA through oral exposures," Vandeberg said. "BPA is used to line the inside of cans, and that's thought to be a major exposure in adults." 

WBZ-TV’s full report is available at http://wbztv.com/local/overweight.babies.obesity.2.1439102.html.