One of the real breakthroughs is when someone figures out long-term storage capacity.
Share this quote
Source, in full
US statesman and economist, discussing the need for improvements in batteries or other energy storage technology to better integrate solar and wind energy into the electrical grid, as quoted in "George Shultz: 'Climate is changing,' and we need more action: Former secretary of state - and former MIT professor - urges progress on multiple fronts" MIT News. October 1, 2014.