For years, charges have been made that a common chemical found in plastics, known as BPA, is responsible for birth defects, obesity and even cancer. And while activists have been successful getting their message into the media, they’ve been less successful in getting it validated by peer-reviewed science.  The latest hit to the anti-BPA crusade comes from Canada, where a leading health agency examined 132 food products in 33 food categories and found that current levels of BPA in plastic do not pose any health risk whatsoever to consumers. Since Canada’s scientific findings also mimic those found in the U.S., Europe and Japan, maybe it’s time to tighten the cap on this anti-plastic bottle hype.