· Coal IPCC 2040 Average Coal Oil / Natural gas Lowcarbon Wind energy demand grows 44% 48% 55% 19% Solar Bioenergy Other Oil Natural gas still integral Wind/Solar Bioenergy Other IPCC 2040 average estimated demand IEA 2019 total energy demand IPCC 2040 Lower 2°C energy demand range Low High Source: (left) IEA World Energy Outlook .