Pros: very informative, wide range of topics
Climate progress is a great site for news and expert opinion regarding climate change. The man who runs it - Joseph Romm - was acting assistant secretary of energy for energy efficiency and renewable energy during the Clinton Administration. He knows his stuff. He's also written several great books. The blog covers all kinds of news related to climate change, such as plans to build new power plants and legislation to fund renewable energy technology. And Romm updates the blog several times daily. Very intersting and informative! I'm a big Romm fanboy.