The Intergovernmental Panel on Climate Change predicts that temperatures are most likely to rise by 1.8C-4C by 2100. But the possible range is much greater; 1.1C-6.4C. The maps above show how a range of three different scenarios will affect different parts of the planet.
The emissions scenarios, A1B, A2, B1, used to create the maps above, are based on a range of detailed economic and technological data. These versions of the future consider different population increases, fossil and alternative fuel use, and consequent CO2 increases. The broad range of outcomes they show is displayed in the charts below.
Carbon dioxide is the main greenhouse gas, its rise since the industrial revolution is clear. Burning coal, using oil and deforestation all place CO2 into the atmosphere.
The other two main greenhouse gases are methane and nitrous oxide. Both gases have a much smaller presence in the atmosphere than CO2 but are much stronger greenhouse gases; methane has over 20 times the effect of C02, while nitrous oxide is nearly 300 times stronger.
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