According to the National Renewable Energy Laboratory (NREL) in its recent report, clean technologies must scale up quickly in order to reach 100% clean electricity by 2035.

Wind and solar energy would provide 60%–80% of generation in the least-costly electricity mix in 2035, according to the NREL model.

The overall generation capacity would grow to roughly three times the 2020 level by 2035 – including a combined 2 TW (terawatts) of wind and solar.

To achieve those levels would require an additional 40–90 GW of solar on the grid per year and 70–150 GW of wind per year by the end of the decade, said NREL. That is more than four times the current annual deployment levels for each technology.

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