BrownfieldFeb. 27, 1986: Facing mounting pressure to disclose the extent of pollution at U.S. nuclear weapons facilities, the Department of Energy releases 19,000 pages of documents from the Hanford Nuclear Reservation in Washington state. One 1974 document reports the release of nearly half a million curies of radioactive iodine during Hanford's first three years of operation in the 1940s.

February 27, 2001: A month after taking office, U.S. President George W. Bush proposes an increase in funding for cleaning up "brownfields," polluted industrial sites (at right), for redevelopment.

Feb. 27, 2002: Eric Schaeffer, chief enforcement officer for the U.S. Environmental Protection Agency (EPA), resigns, alleging White House interference in EPA's enforcement efforts. Schaeffer later founds and leads the Environmental Integrity Project, a non-profit watchdog group monitoring Federal enforcement agencies.

Photo: Steve Allen/Jupiterimages

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.