Global Warming

Increased atmospheric concentrations of greenhouse gases produced by mankind have led to a global rise in surface temperatures. Since the beginning of the 20th century the average temperature increased by about 0.8°C (1.4F). Climate model projections indicate that the global surface temperature is likely to increase by another 1.1 to 6.4°C (2 to 11.5F) by the year 2100 depending on man-made greenhouse gas emissions during that time.
The consequences of the warming may be severe. Sea level will rise due to the combined effects of the thermal expansion of warming waters and the increased melting of glaciers and ice sheets. The projected sea level rise is in the range of 56-200 cm (22-79 in) for the 21st century. Potential consequences for shore-based cities and communities range from coastal erosion and more catastrophic storm surges to a total loss of low-lying areas or islands.
Global warming is also causing a shift in weather patterns. Some regions have experienced an increase in heavy rain events whereas other regions are subject to longer or more severe droughts.
This animation shows the patterns of projected surface warming during the 21st century. Note how temperatures over land and polar areas are rising the fastest.

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