National (U.S.)

Dot Earth's Andrew C. Revkin summarized it best in his account of President Obama's Keystone XL pipeline decision: "How did oil markets react? Zz.z.zz."

"When it comes to the fate of the 1,700-mile Keystone XL pipeline, proponents and foes agree that the fight did not end with President Obama’s decision Wednesday to reject the pipeline’s permit application. The question is how the battle will be waged in the months to come."

EPA's "Documerica" photo archive, suppressed by the Reagan administration and forgotten for years, is being revived. It provides a stunning series of "before" pictures as a context in which to place the pollution control now under assault by Republicans. And it offers cash-strapped journalists a treasure-trove of copyright-free graphics.

"For the past 30 years, botanist Nicholas Money has studied the microorganisms that most people associate with bad smells, itchy toes, damp basements and rotten food. A renowned fungal researcher at Miami University in Ohio, Money has devoted his career to studying indoor molds, fungal movements and the mysterious world of mycology."

"So much for embracing climate science as a Republican presidential candidate in 2012. The demise of Jon Huntsman's White House hopes leaves GOP climate moderates without a champion in the remaining Republican field, especially given front-runner Mitt Romney’s efforts to convince global warming skeptics that he’s one of them. And that raises questions about how the party’s eventual nominee will fare with science-minded voters against President Barack Obama in November."

"DETROIT — Writing new regulations that will require cars and trucks to have significantly higher fuel economy by 2025 prompted years of fighting among automakers, environmentalists, regulators and consumer groups. But now that the standards have been proposed, nearly everyone involved in the process is on board with the results, as a public hearing held Tuesday in Detroit showed."

"There's a solar trade war going on inside the U.S., sparked by an invasion of inexpensive imports from China. The U.S. solar industry is divided over these imports: Panel-makers say their business is suffering and want a tariff slapped on the imports. But other parts of the industry say these cheap panels are driving a solar boom in the U.S."

Changes in federal flood insurance policy, along with increased flood risks from global warming, may encourage development in the wrong places.

"President Obama, denouncing a 'rushed and arbitrary deadline' set by congressional Republicans, announced Wednesday that he was rejecting a Canadian firm's application for a permit to build and operate the Keystone XL pipeline, a massive project that would have stretched from Canada's oil sands to refineries in Texas.

"HANFORD SITE, Wash. – Seven decades after scientists came here during World War II to create plutonium for the first atomic bomb, a new generation is struggling with an even more daunting task: cleaning up the radioactive mess."