But should he proceed with regulations to control pollution from existing coal-fired power plants, the single largest source of carbon pollution, those regulations probably will contribute to shuttering facilities already struggling to compete with cheap natural gas.

NPR: PROMISES, PROMISES: Climate Change

And it's often forgotten because this is an executive action that he did in concert with major automobile companies, but taken by itself this single action did more to reduce carbon pollution than any other action that has been taken, in our view.

WHITEHOUSE: Press Briefing

The Pentagon's ultimate goal of creating a single network of sensors may also benefit state and local programs designed to monitor air pollution, noxious fumes and municipal water supplies, the report stated.

CNN: DOD deploying hazard-detection network