Many leaders of the Group of 20 major economies on Friday expressed concerns over an escalating trade war between the United States and China, identifying it as a serious downside risk to the global economy, along with geopolitical tensions in the Middle East.On the first day of their two-day summit in Osaka, the leaders assessed the status of the global economy while skepticism persists over whether they can jointly uphold the rules-based, multilateral trading system."Concerns were expressed by many countries about heightened trade tensions," a senior Japanese government official said.The …READ FULL ARTICLE