For the past three years, leading scientists from more than 40 countries have been conducting a physical of the planet. They have monitored its vital signs, probed its parts, taken its temperature, measured its bodily fluids. This article deals with the global-warming report for the United Nations released by a panel of 1,200 scientists at a news conference in Paris. The signs of that change in the earth's climate have been building up, for all to see, during the past few decades, according to the scientific panel. The assessment by the Intergovernmental Panel on Climate Change offered the strongest indictment yet of humanity's role in global warming. There is a greater than 90-percent chance that greenhouse-gas pollution has caused much of the warming recorded over the past 50 years, and the pace at which temperatures will rise is "very likely" to accelerate in coming decades, warned the panel, which is better known as the IPCC. In this article, the author discusses the impacts projected by the IPCC.