Polychain Capital, an American investment firm, led a $4.3m funding round in Vespene Energy, a methane mitigation company. "The continued adoption of Bitcoin will benefit from solutions that make the energy mix for mining more focused on clean energy. We are excited to partner with Vespene as they build a creative solution to use mining to eliminate a potent greenhouse gas source, while making its energy mix greener," Olaf Carlson-Wee, Polychain Capital Founder & CEO.