How many investigations of climate scientists’ stolen e-mails does the world really need? The answer, in Washington at least, appears to be five. And counting.

“I’m not ‘Ragweed Appleseed,’ I don’t go around planting ragweed. I’m just the messenger. The reality is I’m going to have more patients,” Dr. Jay Portnoy, an allergy specialist, said.

As the market for applications running on mobile devices like Apple’s iPad and iPhone grows, so do ways to save you money and cut your carbon emissions.

Three pushes will be needed to put the United States out in front on clean energy, a Stanford professor says: “There’s a climate motivation and a(n) (energy) security motivation and a competitiveness…

Arizona Public Service is giving fans of the Arizona Diamondbacks and green energy advocates something to cheer about: an array of solar panels that doubles up as a shade for people queuing.

Encouraging American innovation is a major piece of the president’s strategy to win the future. And a global leadership position in innovation is ours to lose.

What happens when the airport scanner shows shapes that look like live spiders, snakes, lizards and tortoises inside three big suitcases?

It’s been one spate of severe winter weather after another since before 2011 began. That has given plenty of ammunition to climate skeptics who maintain that these cold snaps raise questions about…