Costa Rica has provided all of its electricity from renewables, usually a mix of 68 percent hydro, 15 percent geothermal, and 17% mostly diesel and gas, for the first 100 days of 2015.  The Tico Times reports (http://www.ticotimes.net/2015/04/22/costa-ricas-renewable-energy-streak-is-still-going-but-what-does-that-really-mean)

“The clean energy streak is likely to continue. Last Friday [April 17, 2015] ICE (Costa Rica Electricity Institute)  released a report estimating that 97 percent of the country’s electricity will be produced from renewables this year. This is good news for Costa Rican residents, who will see their electricity prices drop up to 15 percent starting this month.”

In 2016, Costa Rica is a launching a satellite to monitor CO2 across the world tropical belt

(http://www.ticotimes.net/2014/04/22/costa-ricas-first-satellite-to-be-launched-into-space-in-2016)

“…the first Central American satellite, built in Costa Rica, will be launched into space in 2016.  The satellite will collect and relay daily data on carbon dioxide to evaluate the effects of climate change.”

Costa Rica announced in 2009 that it plans to be a carbon neutral country by 2021 and they are following through on that planning.