Green Mountain is on a mission to change the way power is made by offering consumers the choice of clean energy. It’s the longest-serving renewable energy retailer, and to date, its customers have avoided almost 50 billion pounds of carbon dioxide emissions.

As the exclusive carbon offset provider for SXSW Eco, Green Mountain calculates the emissions generated by attendee travel and purchases carbon offsets to support sustainable projects that are minimizing or reducing harmful greenhouse gas (GHG) emissions. At last year’s event, more than 641 metric tons of GHG emissions were offset by Green Mountain.