Climate change: world is reaching tipping point

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1. Which parameters do you propose to change, by how much, and by what means?

To develop strategies for reducing CO2 emissions, the Kaya identity can be used to decompose energy-related CO2 emissions into four factors:
1) population,
2) gross domestic product (GDP) per capita,
3) energy intensity (i.e., total primary energy supply (TPES) per GDP) and
4) carbon intensity (i.e., CO2 emissions per TPES). [1.1.4]

CO2 emissions = Population x (GDP/population) x (TPES/GDP) x (CO2/TPES)

The annual change in these four components is illustrated in Figure TS.1.2. [1.1.4]

From http://srren.ipcc-wg3.de/report/IPCC_SRREN_TS.pdf page 34.