Tensions over trade and climate change simmered Friday as the Group of 20 summit commenced in Osaka.
The two-day summit brings together 37 presidents, prime ministers, and heads of international organizations.
It opens as world leaders are expressing increased concern over potential damage to the world economy if a trade war escalates between the United States and China, and over growing protectionist sentiment in many G20 member states where multilateral forums like the G20 are blamed for job loss and wealth inequality.