Even with EPA goals, 30 percent of U.S. electricity will come from burning coal.

The EPA says reducing carbon emissions will cost billions but create energy jobs.

That's the good news. Less good: The next half is the hard part.

More on the EPA's aim to cut power plants' carbon emissions 30% by 2030

And compared to the U.S. economy, that's kinda small.

But nobody knows which states. It depends on how the rules get written.

The Obama Administration readies its regulation of carbon-dioxide emissions.

Weighing the immediate costs of wringing more sulfur out of emissions, against long-term health and economic benefits from less smog.

Belching cattle are a larger source of methane gas emissions than natural gas drilling.

The President announced ambitious new EPA targets today — at a Safeway.