Figure 1.

The relationship between risks from climate change, temperature increase and carbon dioxide emissions, and changes in annual greenhouse gas emissions. Reproduced from the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report [18]. (a) shows the level of additional risk due to climate change for five different threats. The risk per threat is scaled from “Very high” to “Undetectable” (see color legend below (a)) for each increase in global mean temperature; (b) shows the relationship between cumulative greenhouse gas emissions (in GtCO₂) and changes in global mean temperature. The ellipses represent CO₂ emissions under the different IPCC scenario categories; (c) links cumulative CO₂ emissions to changes in annual greenhouse gas emissions by 2050.