ABSTRACT
Heat waves. Drenching rains. Disappearing glaciers and retreating Arctic sea ice. Drought and extensive wildfires in the western US. Ice shelf collapse. Melting near the top of the Greenland Ice Sheet. Unprecedented occurrence of powerful hurricanes causing extensive coastal erosion. An increased rate of sea level rise. Deforestation, land cover change and loss of species. Headline after headline reporting on global warming and the changing climate. Are we experiencing just natural fluctuations, or are human activities at least in part, and perhaps in large part, responsible for these events? What more can lie ahead?
