C-Zero Inc., a clean energy company that has developed a technology for natural gas decarbonization, announced today that it has closed a $34 million dollar financing round led by SK Gas, a subsidiary of South Korea’s second-largest conglomerate, the SK Group. SK Gas was joined by two other new investors - Engie New Ventures and Trafigura, one of the world’s largest physical commodities trading companies - in addition to participation from all existing investors including Breakthrough Energy Ventures, Eni Next, Mitsubishi Heavy Industries and AP Ventures.