Green energy is a hot topic. From solar to wind and everything in between, finding sources that don’t rely on carbon-based fuels is a key to long-term sustainability. Alternative energy has come a long way in the last decade, but there is still a long way to go. Wind, solar, hydro and geothermal energy are terms you’ve probably heard. In some areas, it’s possible to opt into alternative energy with companies like Clean Currents. In others, you may be on your own.