Costa Rica has achieved a clean energy milestone by using 100% renewable energy for a record 75 days in a row.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/costa-rica-has-used-only-renewable-energy-15
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/costa-rica
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fossil-fuels
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geothermal-energy