Costa Rica has powered its electricity grid for over 100 days entirely by renewable energy. The Latin American country has been run on renewable energy for 121 days and is now aiming for a year without fossil fuels. Last year, renewable energy sources accounted for 99 per cent of the country’s electricity and 285 days were powered completely by renewable sources, Inhabitat reports, citing the Costa Rican Electricity Institute. The majority of the nation’s renewable…