"The Environmental Protection Agency detailed its plans on Tuesday for research into the possible health and environmental risks of nanomaterials, tiny substances that are finding growing use in products like sunscreens and industrial adhesives."

A new generation of urban, blue-collar environmentalists is waging war over "environmental justice" in the dense, polluted Latino neighborhoods of Los Angeles.

"This fall may prove to be a watershed moment for the parks," as a six-part PBS series by Ken Burns highlights their glories and their problems -- air pollution, a changing climate, and needed upkeep among them.

"Victims of the tsunami that swept across the South Pacific had only minutes to escape the deadly waves and in some cases didn't receive alerts of danger, despite years of work to upgrade early-warning systems across the region."

"An early version of Senate climate legislation obtained today by E&E confirms that Sens. Barbara Boxer (D-Calif.) and John Kerry (D-Mass.) largely plan to follow the path their Democratic colleagues pursued in the House-passed climate bill."

"With more and more toxic chemicals turning up in people's bodies and the environment, the Obama administration asked Congress Tuesday to draft a tougher law for how the government regulates tens of thousands of chemicals."

"Global investment in clean technology roared back in the third quarter, driven by solar power and a public offering that underscores growing enthusiasm for the sector, Greentech Media reported on Monday."

"The contested air permit for the Sithe Global Desert Rock coal-fired power plant on the Navajo Reservation in New Mexico today was sent back to the U.S. Environmental Protection Agency for additional analysis."

"More than 50 years after nearly being wiped out in eastern U.S. forests by a deadly imported fungus, the American chestnut may be on the comeback trail."

"Waterways across the upper Midwest are increasingly plagued with ugly, smelly and potentially deadly blue-green algae, bloomed by drought and fertilizer runoffs from farm fields, that's killed dozens of dogs and sickened many people."