Global Weirdness summarizes, in clear and accessible prose, everything we know about the science of climate change; explains what is likely to happen to the climate in the future; and lays out in practical terms what we can and cannot do to avoid further shifts. Sixty easy-to-read entries tackle such questions as: Is climate ever "normal"? Why and how do fossil-fuel burning and other human practices produce greenhouse gases? What natural forces have caused climate change in the past? What risks does climate change pose for human health? What accounts for the diminishment of mountain glaciers and small ice caps around the world since 1850? What are the economic costs and benefits of reducing carbon emissions?