U.S. Special Envoy for Climate Change Travel to Canada Dr. Jonathan Pershing will travel April 12 – 13 to Ottawa, marking his first official trip as U.S. Special Envoy for Climate Change. Read More» By U.S. Embassy Ottawa | 12 April, 2016 | Topics: Environment, Key Officials, News, Ottawa, U.S. & Canada | Tags: Climate Change, Department of State, Jonathan Pershing