A troubling new nationwide survey conducted by researchers at the University of California, San Francisco finds that most doctors do not inform patients about environmental risks they might encounter while pregnant. Although they do routinely address issues like smoking, alcohol and diet, only 19 percent said they talk to their pregnant patients about pesticides and just 12 percent discuss air pollution with pregnant mothers. This is very disturbing news, considering that environmental risks have been linked to a vast array of health issues for children, ranging from learning disabilities to cancer.