"The Economist" has two great articles in their "Technology Quarterly," one on the state of wind power globally and the other on the Masdar Initiative. "The Economist," as you no doubt know by now, has terrific coverage on energy, the environment and climate change. I wrote about the Masdar Initiative, along with some other big-vision projects, here a while back. Fantastic, hopeful project.
I've flagged a number of superb articles from "National Geographic Magazine" to you. Let me just direct you now to the National Geographic Society website on Global Warming. There are good articles, videos, quizzes, interactive features and, of course, stunning photography.