“Green” Costa Rica 100% Clean Energy for 94 Straight Days (Video)

Eight years later a handful of other countries have joined this pledge, but none with the ambitious timeline that Costa Rica—a country rich in hydroelectric and geothermal power sources—aims to meet. If it reaches this target, it will likely be the first country in the world to officially achieve carbon neutrality. So far 2015 has been a promising year in this pursuit.