The Centers for Disease Control is postponing the release of a report detailing areas of environmental concern and human health problems in the Great Lakes region. Living on Earth host Steve Curwood talks with Christopher De Rosa, who was director of the Division of Toxicology and Environmental Medicine at the CDC and oversaw the report. De Rosa was demoted when his work on toxins in the Great Lakes, and on formaldehyde in FEMA trailers for Hurricane Katrina survivors, was publicized.