surface temperature increased 0.74 ± 0.18 ° C (1.33 ± 0.32 ° F ) during the 20th century. Climate model ....projections summarized in the latest IPCC report indicate that the global surface temperature is likely to rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the 21st century (http://en.wikipedia.org/wiki/Global_warming)". So everybody are trying to save the Planet