Finance leaders from the Group of 20 major economies said Sunday that heightened trade and geopolitical tensions pose an increased threat to global economic growth, calling for greater dialogue and action.The G-20 finance ministers and central bank governors agreed that international trade and investment are "important engines of growth," according to their communique issued after a two-day meeting in Buenos Aires, but they stopped short of producing concrete steps to prevent the spread of protectionism.The meeting came at a time when trade tensions are running high between the United State…READ FULL ARTICLE