A U.S. energy official says “no country should have to sacrifice economic prosperity or energy security in pursuit of environmental sustainability” during a U.N. climate discussions in Poland. Preston Wells Griffith, Principal Deputy Assistant Secretary of International Affairs at the Department of Energy, spoke at a U.S. government-sponsored event Monday in Katowice, responding to criticism of the U.S. administration’s policy of supporting the fossil fuel industry. Zlatica Hoke reports.