Craig Cohon has had an unusual career. The 59-year-old Canadian helped bring Coca-Cola to Russia in the early 1990s and co-owned Cirque du Soleil in the country. He once managed an opera singer and worked for the World Economic Forum. Those decades of globetrotting have taken their toll on the planet. When Cohon set out to calculate his lifetime carbon footprint, taking into account everything from his journeys into adulthood to his childhood diet, he pegged it at 8,147 metric tons of carbon dioxide equivalent—28 times the global average. "I feel that I am 100% responsible and 100% guilty for my personal harm to the world and I am not 100% guilty because I was not aware at a deep level of unintended consequences," Cohon told Bloomberg Green. "But now that I understand it, I personally do something about it." (Olivia Rudgard)