I'm not sure where people are getting this terminology of "unlimited" energy from fusion. Nothing in the universe is unlimited. The earth's supply of deuterium and/or tritium is not unlimited.<p>It's also not infinitely "clean" energy. A fusion reactor is not a black box that is built once and never again maintained or rebuilt, or doesn't use any consumable components besides fuel.<p>We already have the technology that gives us <i>nearly</i> clean energy, namely nuclear (fission) reactors. If we truly want to reduce CO2, we should be ramping up nuclear power, as a bridge to switching to renewables in the long term. If only nuclear power wasn't so politically... radioactive.