Click on the image to access the graphs and audio presentation on BBC.
Also see timeline of Climate Change published by New Scientist.
900-1300: The Medieval Warm Period brings warm weather to Europe, thanks to an unusually strong North Atlantic Oscillation bringing in extra heat.
1350-1850: The Little Ice Age chills parts of the northern hemisphere.
1709: As the Little Ice Age comes to an end, Europe experiences a freakishly cold winter.
1827: French polymath Jean-Baptiste Fourier predicts an atmospheric effect keeping the Earth warmer than it would otherwise be. He is the first to use a greenhouse analogy.
1863: Irish scientist John Tyndall publishes a paper describing how water vapour can be a greenhouse gas.
1890s: Swedish scientist Svante Arrhenius and an American, P C Chamberlain, independently consider the problems that might be caused by CO2 building up in the atmosphere. Both scientists realise that the burning of fossil fuels could lead to global warming, but neither suspects the process might already have begun.
More on the Timeline.
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