In large, populous nations, the complete reliance on these renewables would require what we are still missing: either mass-scale, long-term (days to weeks) electricity storage that would back up intermittent electricity generation, or extensive grids of high-voltage lines to transmit electricity across time zones and from sunny and windy regions to

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The United States could produce all its power by covering 2% of its land with solar panels - for comparison, we use 20% of our land for agriculture, so this would look like Nevada specializing in farming electricity somewhat less intensely than Iowa specializes in farming corn