Figure 2: Time series of global primary energy consumption.

Nominal demand in the (a) Fossil Fuels, (b) BAU, (c) RE-Low and (d) RE-High scenarios is shown as time series in each panel. Energy profiles in year 2100 of alternative pathways, used to determine model sensitivity to primary energy demand, are displayed as columns at right. At bottom, time series of fossil fuel market share (as a percentage of total energy consumption) and atmospheric CO2 concentration are displayed at quarter-century intervals. Source of historical data on total primary energy demand: International Energy Agency39.