Geothermal energy is touted to play a fairly significant role in the US's future energy mix, but the technology continues to struggle with high upfront costs.
While the world brings record levels of clean energy online, geothermal energy growth is virtually stagnant, but the increased push to decarbonise heating systems could see the technology receiving renewed attention.
Kenya's 100% renewable energy dream is being dampened by conflicts between indigenous communities and investors over land rights.
Caribbean islands are increasingly focusing on renewables. Being located on a volcano makes geothermal an interesting option.