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Table 1 Global warming

From: Climate change, air pollution and extreme events leading to increasing prevalence of allergic respiratory diseases

• The global warming average air temperature has increased by 1.0±0.3°F (0.6±0.2°C) since the late 19th century
• The average surface temperature of the earth is likely to increase by 2 to 11.5°F (1.1-6.4°C) by the end of the 21st century
• The average rate of warming over each inhabited continent is very likely to be at least twice as large as that experienced during 20th century
  1. Working Group I Report of the Intergovernmental Panel on Climate Change (IPCC) 2007.