Typhoon Haiyan has claimed thousands of lives on The Philippines island of Leyte, and frantic efforts are under way to get food, water, and medical care to tens of thousands of survivors. The storm may be among the most powerful ever recorded. What are some of the others?
Natural gas is cleaner than coal, but only if the industry can control its methane releases. A new report says it's doing OK, but methane releases are underestimated.
Results: 1 of 15