Answer: Indian Ocean
Notes: The United States President imposed a 10% tariff on imports from Heard and McDonald Islands, even though these islands have no known exports to the US. Heard and McDonald Islands are remote volcanic islands in the southern Indian Ocean, about 4,100 km from Perth, Australia, and 1,600 km from Antarctica. They are one of Australia’s seven external territories and are directly governed by the Australian government. Heard Island has Big Ben volcano with Mawson Peak, the highest mountain in Australia outside mainland and Tasmania. McDonald Island is smaller but has doubled in size due to volcanic eruptions in the 1990s and 2000s. These are the only volcanically active sub-Antarctic islands and are used to study earth’s crust, climate change, and glaciers. They are part of a United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage Site since 1997
