KEY

Task 4: The Intergovernmental Panel on Climate Change (IPCC) February 2007, Paris.

extremely likely - more than 95%

very likely - more than 90%

likely - more than 60%

more likely than not - more than 50%

unlikely - less than 33%

very unlikely - less than 10%

extremely unlikely - less than 5%

+ probable, possible

• It is very likely that human activities are causing global warming

• Probable temperature rise by the end of the century will be between 1.8C and 4C (3.2-7.2F)

• Possible temperature rise by the end of the century ranges between 1.1C and 6.4C (2-11.5F )

• Sea levels are likely to rise by 28-43cm

• Arctic summer sea ice is likely to disappear in second half of century

• It is very likely that parts of the world will see an increase in the number of heatwaves

• Climate change is likely to lead to increased intensity of tropical storms