Climate change poses many challenges that affect society and the natural world. With these challenges, however, come opportunities to respond. By taking steps to adapt to and mitigate climate change, the risks to society and the impacts of continued climate change can be lessened. The National Climate Assessment, coordinated by the U.S. Global Change Research Program, is a mandated report intended to inform response decisions. Required to be developed every four years, these reports provide the most comprehensive and up-to-date evaluation of climate change impacts available for the United States, making them a unique and important climate change document. The draft Fourth National Climate Assessment (NCA4) report reviewed here addresses a wide range of topics of high importance to the United States and society more broadly, extending from human health and community well-being, to the built environment, to businesses and economies, to ecosystems and natural resources. This report evaluates the draft NCA4 to determine if it meets the requirements of the federal mandate, whether it provides accurate information grounded in the scientific literature, and whether it effectively communicates climate science, impacts, and responses for general audiences including the public, decision makers, and other stakeholders.

When the 44th President of the United States is elected, he will face urgent crises on three major fronts: the American economy, the wars in Iraq and Afghanistan, and the growing threat to the world environment caused by climate change. This short, powerful book shows the way forward: a clear action plan for the new President's first 100 days, that if implemented will set America on course for dynamic job creation and economic growth, reduce our conflicted dependence on foreign oil, and produce energy that is green, affordable, and renewable. Backed by sound science and based on the best ideas of America's experts, The 100 Day Action Plan to Save the Planet outlines practical steps that include: *Launch a "clean energy surge" and create a powerful new workforce of green manufacturing, supply, technology, management, and support jobs. *End carbon subsidies that make fossil fuels much cheaper than their actual cost. *Create a market by requiring all federal buildings, facilities, and transportation to be fueled by renewable green energy. *Reward innovation and early adoption of renewable energy in the private sector. * Work constructively with other nations for global solutions to the climate crisis. It's not too late; climate change can be dramatically reversed. Green energy is the key to America's economic strength and independence—but the nation needs the president to act boldly and decisively, just as Franklin Delano Roosevelt did in his first 100 days in office, during a time of similar urgency.

Summarizes the science of climate change and impacts on the United States, for the public and policymakers.