Growing levels of coastal erosion are washing away California's beaches. Jeffrey Kaye of KCET Los Angeles explores the problem and restoration efforts.
Last week's sweeping power outages heated up the debate over the country's energy policies. Kwame Holman reports.
A power grid failure on Thursday left much of the northeastern U.S. and parts of Canada without electricity. Experts discuss the structure and vulnerability of the U.S. electrical grid system.
President Bush announced Monday that his choice to head the Environmental Protection Agency is Utah Governor Mike Leavitt, a Republican and an advocate of shifting environmental regulation to the states.
President Bush has tapped Utah Governor Mike Leavitt to lead the Environmental Protection Agency. Experts assess the likely political and environmental impact of the Leavitt nomination.
President Bush nominated Utah Governor Mike Leavitt to head the Environmental Protection Agency. Betty Ann Bowser reports on the nimonee's political background.
A battle over federal wilderness designations in Utah ended when the state convinced the federal government to drop certain land restrictions, an agreement environmentalists say will endanger pristine areas.
Scientists said they discovered a planet that is some 9 billion years older than any known previously. Jeffrey Brown discusses the finding with Alan Boss of the Carnegie Foundation.
Betty Ann Bowser reports from Hamilton, Montana, where the National Institutes of Health wants build a new laboratory to study some deadly pathogens.
A test yesterday may have revealed the cause of February's space shuttle Columbia disaster. Gwen Ifill discusses the continuing investigation with The New York Times' Matthew Wald.
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