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Billion tonnes CO 2<br />
90.0<br />
80.0<br />
70.0<br />
60.0<br />
50.0<br />
40.0<br />
30.0<br />
20.0<br />
10.0<br />
Global emission of fossil fuel CO 2 (inc. cement)<br />
Rio + 20<br />
0.0<br />
1980 1990 2000 2010 2020 2030 2040 2050<br />
Year<br />
~3GtCO 2 for 2000-2050<br />
~5GtCO 2 for 2000-2100<br />
… i.e. a 4°C – 6°C rise between 2050 & 2100
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