"Responding to renewed interest in geoengineering schemes to combat global warming, scientists and policymakers are beginning several efforts that could set new ground rules for research, including large-scale field experiments."

"Just as millions head to tanning beds to prepare for spring break, the Food and Drug Administration will be debating how to toughen warnings that those sunlamps pose a cancer risk. Yes, sunburns are particularly dangerous."

"More than two decades after parents dumped apples from children's lunch boxes because of concerns about a chemical applied to the fruit, most researchers agree the crop is safer although most of it still carries pesticide residue."

"Canadian children were exposed to jewelry containing 100 per cent lead for over a year because Health Canada failed to alert parents of the potentially deadly risk, Canwest News Service has learned."

"After the spill, the crude oil was expected to biodegrade and wash away from Prince William Sound. But that didn't happen."

"Since 2004, [Ohio] has allowed 42 treatment facilities, power plants and factories to ignore federal limits on dumping mercury into lakes, rivers and streams."

"TVA's new spokesman — brought in to help rehab its credibility after the coal ash disaster — was enmeshed at his previous job at NASA in a Bush administration controversy in which climate change scientists said they were censored."

"U.S. Commerce Secretary Gary Locke declared a commercial fishing disaster for Yukon River king salmon Friday following two years of poor runs, fishing restrictions and bans."