There is agreement approaching consensus that a successful program of action on climate change must support two objectives—stabilizing atmospheric greenhouse gases (GHGs) and maintaining economic growth. Achieving both these aims will require a tenfold increase in "carbon productivity," the amount of GDP produced per unit of carbon equivalents (CO2e) emitted. The economic costs of this "carbon revolution" are likely to be manageable at some 0.6–1.4 percent of global GDP by 2030.