Categories Solar Energy News 76 days and zero fossil fuels. Post author By AWPS Renewable Energy Post date September 8, 2016 Tami Freed/Shutterstock.com Costa Rica has been running on 100% renewable energy for 2 months straight 76 days and zero fossil fuels. ← 4 MM Naira fueling my Gen. WHY? → China covered all its new energy demand with Solar and Wind