The DDPP shows that deep decarbonization is technically feasible and affordable, and it has identified pathways to 2050 that avoid the traps and temptations of low-hanging fruit and put the major economies on track to full decarbonization by around 2070. The pathways all rely on three pillars: major advances in energy efficiency, using smart materials and smart (information-based) systems; zero-carbon electricity, drawing upon each country’s best options, such as wind, solar, geothermal, hydro, nuclear, and carbon capture and storage; and fuel-switching from internal combustion engines to electric vehicles and other shifts to electrification or advanced biofuels.