Council on Environmental Qualityhttp://www.whitehouse.gov/administration/eop/ceq/blog
Coming straight from Washington, D.C., the heart of the United States, the Council on Environmental Quality works to develop effective environmental policies and initiatives. As one of the White House blogs, you can rest assured that this blog is official.
Environmental and Urban Economicshttp://greeneconomics.blogspot.com/
The author of this blog is a professor at UCLA who holds an interest in economics. On this blog, you'll find his thoughts on environmental and urban issues, which are, inevitably, from an economic perspective.
The Oil Drumhttp://www.theoildrum.com/
One of the main goals of this blog is to make the public aware that we are incredibly reliant on energy, but that its sources are diminishing. Energy has a profound role in society, and these bloggers are working to ensure that people are filled in.