Pregnant women and new moms who worry about outdoor air pollution might be wiser to worry about the air inside their car. Researchers sampled windshield film and dust from the insides of 2000- to 2005-model cars and discovered high levels of two chemicals found in auto interiors: PBDEs, used as fire retardants, and phthalates, used to soften plastics. Both have been linked with birth defects, impaired learning and premature birth in laboratory animals. The chemicals are released faster at extremely high temperatures, and car interiors can easily rise to 190* F in the summer. Reduce the release and breakdown of these chemicals by using windshield solar reflectors, leaving windows cracked open and parking in the shade whenever possible.