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<p>"An increasing body of observations gives a collective picture of a warming world and other changes in the climate system." Intergovernmental Panel on Climate Change (IPCC), 2001</p><p>The map of early warning signs clearly illustrates the global nature of climate changes. In its 2001 assessment, the Intergovernmental Panel on Climate Change (IPCC) concluded that, ?an increasing body of observations gives a collective picture of a warming world and other changes in the climate system."</p><p>While North America and Europe?where the science is strongest?exhibit the highest density of indicators, scientists have made a great effort in recent years to document the early impacts of global warming on other continents. Our map update reflects this emerging knowledge from all parts of the world.</p><p>Although factors other than climate may have intensified the severity of some of the events on the map, scientists predict such problems will increase if emissions of heat-trapping gases are not brought under control.</p>