Sea levels will rise, causing flooding in low-lying areas such as the Maldives and Kiribati.
Storm activity will increase due to more atmospheric energy.
Agricultural patterns will change, for example, the USA's grain belt will shrink and production is likely to decline, but Canada's growing season will get longer and probably more productive.
There will be less rainfall over the USA, southern Europe and the Commonwealth of Independent States (CIS)
Up to 40 per cent of wildlife species will become extinct.
There is a degree of uncertainty over the exact impact of climate change.
Some people even suggest that certain areas might get colder, such as north-western Europe of the Gulf Stream shuts down.