< PrevNext > 22. Citi New York City Share 2016 U.S.-Booked Air Volume: $150 millionConsolidated U.S. TMC: Carlson Wagonlit TravelCiti's 2016 U.S.-booked air volume fell about 5 percent, according to BTN's estimate. Meanwhile, revenue declined 2 percent from 2015, and employees at the end of 2016 declined 11,000 to 220,000. In 2016, Citi avoided 6,791 metric tons of carbon dioxide and reduced its greenhouse gas emissions by 28 percent toward the company's 2020 goal. Citi recorded 135,735 metric tons of carbon dioxide equivalent from air travel last year, up 23 percent from 2015. The company also reported that rail travel generated 2,125 metric tons, an increase of more than 33 percent. The company encourages employees to use video- and webconferencing whenever possible rather than traveling. When travel is unavoidable, the company asks employees to group trips to manage costs, and it offers employees the option of train travel whenever feasible. In 2015, Citi began to measure its travel suppliers and those in other categories by sustainability and social performance goals. The company plans to put in place related policies and training by 2018.