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How can cities reduce the role they may play in global warming? Could fire departments, garbage collection services, residential building codes, and industrial regulations be greener? Attempting to help address those questions, 21 U.S. cities, including New York, Las Vegas, and New Orleans will describe their major sources of greenhouse gas emissions to the Carbon Disclosure Project, one of the world's largest repositories linking such data to climate change.

At a scientific conference on climate change held this week in Copenhagen, four environmental experts announced that sea levels appear to be rising almost twice as rapidly as had been forecast by the United Nations just two years ago. The warning is aimed at politicians who will meet in the same city in December to discuss the same subject and, perhaps, to thrash out an international agreement to counter it.

The critical role of forests as massive "sinks" for absorbing greenhouse gases is "at risk of being lost entirely" to climate change-induced environmental stresses that threaten to damage and even decimate forests worldwide, according to a new report released April 17. The report will be formally presented at the next session of the United Nations Forum on Forests (UNFF) taking place 20 April-1 May 2009 at the UN Headquarters in New York City.