On continent's boggy Arctic fringe, scientists search for signs of future climate calamity.

PSR and the National Wildlife Federation today released More Extreme Heat Waves: Global Warming’s Wake Up Call, a new report describing the health dangers from extreme heat and identifying the 30 U.S. cities whose populations are most vulnerable.

More extremely hot summer days are projected for every part of the country, detailed in a new report from the National Wildlife Federation and Physicians for Social Responsibility.

PSR recognizes the historic significance of House passage on June 26, 2009, of the American Clean Energy and Security Act (ACES). For the first time, a branch of Congress has taken responsibility for acting to comprehensively reduce greenhouse gas emissions.

The Environmental Protection Agency has made an endangerment finding making it clear that greenhouse gas emissions must be regulated in order to control global warming and protect human health. Last week, PSR leaders applauded the finding and encouraged the EPA to act.

PSR expresses its appreciation to representatives Henry Waxman (D-CA) and Ed Markey (D-MA) and other members for their leadership in moving a comprehensive energy and climate bill, H.R. 2454, through the House Energy and Commerce Committee. However, in order to protect public health from the most catastrophic impacts of global warming, PSR is calling for significant improvements in the bill to make it more effective.

The House Energy and Commerce Committee, splitting largely along party lines, approved on Thursday the most ambitious energy and global warming legislation ever debated in Congress.

Dr. Peter Wilk, PSR Executive Director, is quoted on the impact of global warming on human health.

Dr. Robert Gould, president of San Francisco Bay Area PSR is quoted in this report on reducing meat consumption to lower global warming emissions.

President Obama came to office promising swift and comprehensive action to combat global climate change, and the topic remains a surefire applause line in his speeches here and abroad. Yet the administration has taken a cautious and rather passive role on the issue, proclaiming broad goals while remaining aloof from details of climate legislation now in Congress.

One Antarctic ice shelf has quickly vanished, another is disappearing and glaciers are melting faster than anyone thought due to climate change, U.S. and British government researchers reported on Friday.