WASHINGTON (AP) — A U.N. panel on Monday proposed long-sought greenhouse gas emissions standards for airliners and cargo planes, drawing praise from the White House and criticism from environmentalists who said they would be too weak to actually slow global warming. The International Civil Aviation Organization said the agreement reached by the agency's environmental panel requires new aircraft designs meet the standards beginning in 2020, and that designs already in production comply by 2023.Read more on NewsOK.com