The world will add a record amount of renewable electricity capacity this year as governments and consumers seek to offset high energy prices and capitalize on a solar boom. It is expected to reach 440 GW by 2023, bringing global installed capacity to 4,500 GW, roughly as much as the combined generating capacity of the United States and China. The supply chain for wind turbines is not growing fast enough to meet demand, and the grid must be upgraded and expanded to account for the intermittency of solar and wind power. To meet the goals of the Paris climate agreement, emissions need to be halved by 2030 and cut to "net zero" by mid-century. Countries will discuss setting international targets for renewable energy rollout at the UN climate summit.