"WASHINGTON -– Walmart, the world's largest retailer, has received positive press in recent years for its promises to go green. The company began issuing an annual Global Responsibility Report in 2005. It announced plans to slash emissions in its supply chain in 2010. The company pledged this year to expand the use of renewable energy. But according to a report released Wednesday, Walmart's green pledges remain more hype than reality."

As science celebs praised Carl Sagan for the opening of a collection of his papers at the Library of Congress, they also lamented the mounting attacks on science by opponents of climate change controls.

"MIAMI -- A day before federal wildlife officials are set to send a message to poachers by destroying 6 tons of ivory, U.S. Secretary of State John Kerry announced a $1 million reward program to combat the illegal wildlife trafficking trade."

"House lawmakers are expressing optimism about a landmark Senate compromise to reform the country’s chemical safety law."

"In the mountain streams of the American West, the trout rules. People don't just catch this fish; they honor it. And spend lots of money pursuing it. But some western trout may be in trouble. Rivers and streams are getting warmer and there's often less water in them. Scientists suspect a changing climate is threatening this iconic fish."

"Study suggests far-reaching acceptance of climate change in traditionally Republican states such as Texas and Oklahoma"

"The Obama administration may be about to hand the oil industry a major victory by reducing the federal requirement for blending ethanol into fuel — a decision with big implications for farm-state politics, food prices and the nation’s energy markets."

"The new Interior Secretary has an impressive résumé. Oil geologist, banker, president of REI. But today's Washington is a landscape without maps, and in this age of climate change and keystone, the major battles are taking place over at the EPA and State. Is greatness still possible at Interior?"

"The US will lead the world in oil production for two decades starting in 2015, according to a new report. After that, OPEC will reassert its dominance in oil production."