Can economic growth continue without fossil fuels?
Graham Palmer
16622

I thought you might be interested in this article on the mix of energy sources with hydro-electricity as the main source:

Costa Rica ran on 100 percent renewable energy for 76 straight days between June and August this year, according to a new report, demonstrating that life without fossil fuels is possible…
Since then, the country has been powered on a mix of hydro, geothermal, wind, and solar energy, with hydro power providing about 80.27 percent of the total electricity in the month of August. 
Geothermal plants contributed roughly 12.62 percent of electricity generation in August, while wind turbines provided 7.1 percent, and solar 0.01 percent. 
Just like last year, when Costa Rica managed to power itself for a total of 299 days without burning oil, coal, or natural gas, 2016’s milestone was helped along by heavy rainfalls at the country’s four hydroelectric power facilities.

Science Alert Sept.7, 2016

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