"Environmental groups on Monday announced a new ad campaign that highlights ExxonMobil's massive oil spill in Arkansas last month. The ads will be concentrated in the Washington, D.C., Metro's Foggy Bottom station, which is used by many State Department employees commuting to work, as the agency considers whether to approve the construction of the Keystone XL pipeline."

"WASHINGTON -- President Barack Obama promised on Monday to ensure that scientific research is insulated from partisan politics, as government-funded projects come under attack from Republicans in Congress."

"WASHINGTON -- President Barack Obama said on Thursday he would pick Howard Shelanski, an antitrust expert, as his new regulatory czar, a powerful White House position charged with reviewing regulations proposed by government departments."

"President Obama plans to nominate Charlotte Mayor Anthony Foxx to serve as transportation secretary, a White House official said Sunday."

"WASHINGTON -- Eighteen years after a domestic terrorist murdered 168 people in Oklahoma City with an ammonia nitrate bomb, the federal government and the chemical industry are still jockeying over how to regulate a volatile and plentiful fertilizer that contributed to the devastating plant explosion in West.

At least five federal agencies enforce a patchwork of overlapping and sometimes conflicting regulation of chemical plants. The system is reliant on voluntary reporting by industry, and by nature is largely reactive to complaints or catastrophes.

"The campaign group formed to support Barack Obama's political agenda has launched an initiative to shame members of Congress who deny the science behind climate change."

"Watchdog also says US billionaire's Scottish golf resort could not substantiate claim that tourism will be harmed by turbines."

"The planned ruling would eliminate protection for the top predators, but scientists and conservationists say the proposal is flawed."

"New efforts to force labeling of foods made with genetically modified crops, including a bill introduced by U.S. lawmakers Wednesday, have struck a nerve with biotech crop developers who say they are rushing to roll out a broad strategy to combat consumer concerns about their products."