"WASHINGTON -- Moms, a few dads and some children gathered at the Capitol on Tuesday to urge Congress to strengthen the federal government's powers to regulate harmful chemicals."

"WASHINGTON, DC -- The National Association for Stock Car Auto Racing (NASCAR) signed an agreement with the U.S. Environmental Protection Agency on Monday to raise awareness of environmentally-friendly products and solutions."

"The Energy Department is considering the purchase of experimental centrifuges from the United States Enrichment Corp as a way of channeling money to the ailing nuclear fuel company, which says it needs an infusion of cash by the end of the month."

"The leaders of nearly two dozen environmental groups called on President Obama to attend next month’s Rio+20 Earth Summit in Rio de Janeiro, underscoring the uncertainty that continues to cloud the historic meeting."

"The ultra-conservative group's climate conference showed how far it has fallen after an internet sting and a disastrous ad."

"It was an odd choice of icon for the ultra-conservative Heartland Institute. But there he was in round glasses, beard, and halo of curls staring out from T-shirts and coffee mugs at their gathering of climate change contrarians this week, the scientist whose internet sting set Heartland on its current course of collapse.

"In 2009 and 2010, the Delaware River near Wilmington got a little-noticed early taste of the waste left behind by the controversial natural gas drilling method called fracking. Some 1.4 million gallons of partially treated wastewater collected from hydraulic fracturing, or fracking, wells outside the Delaware River basin were further processed and flushed into Delaware waters through the commercial side of DuPont Co.’s big wastewater plant in Deepwater, N.J., near the foot of the Delaware Memorial Bridge."

"Like evolution, climate science has opened rifts in classrooms across the United States. Educators are lifting climate out of its narrow unit in middle school science – an effort, they hope, that will improve science literacy overall."

"WASHINGTON — Gregory B. Jaczko, whose three-year tenure as chairman of the Nuclear Regulatory Commission has been marked by bitter battles with colleagues and with Congress, announced Monday that he would step down as soon as a successor was confirmed."

"With "Golden Holocaust," historian Robert Proctor deconstructs an industry that still kills more than 400,000 Americans a year."

"Environmentalists battling Canadian oil companies over the proposed Keystone XL pipeline to the Gulf Coast and another link west to Asia are now girding for what they see as industry's Plan C: Move heavy crude to the East.

At issue is a plan announced this week by Enbridge Pipelines Inc. to reverse the flow of a pipeline that now carries 240,000 daily barrels of imported oil west from Canada's East Coast.