经合组织警告称，如果关税进一步上升，全球经济放缓将更加严重。

Core Viewpoint - The OECD warns that further increases in tariffs will exacerbate the slowdown of the global economy [1] Group 1 - The OECD highlights the potential negative impact of rising tariffs on global economic growth [1] - The organization suggests that the current economic slowdown could worsen if trade tensions escalate [1]