Carbon dioxide emissions pathways defined in, or derived from, the original set of Representative Concentration pathways (RCPs), for the
global total carbon dioxide emissions as well as for the carbon dioxide emissions attributable to U.S.
electricity production.
While
total output from low carbon technologies, such as hydro, wind, solar, biomass, geothermal, and nuclear power, has continued to grow, their share of
global primary energy supply has remained relatively constant; fossil fuels have maintained their dominance and carbon dioxide capture and storage (CCS) has yet to be applied to
electricity production at scale.