RADICAL CHANGES

The graph below is from the 2007 4th assessment report of the IPCC and here's the description from the text:

(Figure 2.3). The atmospheric Concentrations of CO2 and CH4 in 2005 exceed by far the natural range over the last 650,000 years. Global increases in CO2 concentrations are due primarily to fossil fuel use, with land-use change providing another significant but smaller contribution. It is very likely that the observed increase in CH4 concentration is predominantly due to agriculture and fossil fuel use. The increase in N2O concentration is primarily due to agriculture. {WGI 2.3, 7.3, SPM}

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