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Five impacts of global warming. Temperature: The global temperature will rise. From now until the end of this century, mankind will face an unprecedented temperature rise. As far as this century is concerned, the optimistic forecast is that the global temperature will rise 1.4 degrees Celsius, and the most pessimistic assumption is that the global temperature will rise by nearly 6 degrees Celsius. Ocean: The sea level will rise. In this century, the sea level may rise by 20 cm to 80 cm. The reason is that glaciers and floating ice on the sea surface melt due to climate warming, sea water expansion (the thickness of floating ice in the Arctic has decreased by 40% in the past 50 years). In Greenland, since 1988, the melting rate of glaciers has accelerated and tripled. Extreme phenomenon: it will cause losses in the future. In recent years, extreme weather phenomena have increased. Most experts believe that in the next 50 years, there will be a severe high temperature in France every two years, similar to that in 2003 (which caused 1.5 million deaths). Drought will have a serious impact on agriculture (a temperature rise of 2 degrees Celsius may lead to a 30% reduction in agricultural production). In southern Europe, rainfall will be significantly reduced. Disease: Humans will bear the brunt. According to Greenpeace's prediction, by 2050, the number of deaths caused by malaria (2.5 million deaths in more than 65,438+000 countries every year) may double, and it will cross the Mediterranean and land in Spain, Italy and France. Other serious tropical diseases will follow, such as Nile virus or leishmaniasis virus that causes digestive tract diseases through flies. In addition, asthma patients will increase, because hot weather will bring more pollen. Biodiversity: Species will die in large numbers. The report quoted Jado, head of the Greenpeace in France, as saying that if climate warming continues at this rate, by 2050,/kloc-0.0 million species will disappear, accounting for 40% of all biological species, while 20% species in France will disappear. Polar bears and other animals in the Arctic will be the main victims like fish in coral reef waters. A study in Germany shows that climate warming will threaten the survival of fish, because climate warming will reduce oxygen in water.