In 2008, Congress passed the Breast Cancer and Environmental Research Act. The act required the US Secretary of Health and Human Services to establish the Interagency Breast Cancer and Environmental Research Coordinating Committee (IBCERCC).
The committee was composed of both federal and non-federal employees, including a number of breast cancer advocates, and was charged with reviewing the state of current research related to environmental risk factors for breast cancer. Their report, released in February of 2013, makes recommendations to eliminate knowledge gaps in this field of research and highlights the urgent need to identify and eliminate environmental causes of breast cancer.
You can find the full report, and a summary of it, HERE