Trump announces tariffs on uninhabited islands

• The Heard Island and McDonald Islands were included because they are Australian territory, according to a White House official.

Zoom in: This region that features the only volcanically active sub-Antarctic islands is "teeming" with colonies of seals, penguins and other birds, per an Australian Antarctic Program post.

• Humans need a permit to visit the Heard and McDonald islands, which are more than 2,000 miles southwest of Perth, Western Australia. It takes two weeks to sail from the Australian mainland.
• People and cargo may also land onshore "by helicopters, inflatable rubber boats (IRBs) or amphibious vehicles supported from a larger vessel," according to the Australian Antarctic Program.

Zoom out: Another region with no permanent human population on Trump's list is the volcanic island of Jan Mayen in the Arctic Ocean. It's collectively designated with Svalbard, an archipelago with polar bears and a small human population some 580 miles north of Tromsø, Norway.

• Trump has assigned 10% tariffs for Svalbard and Jan Mayen, while Norway faces 15% taxes on U.S. imports.

• Also affected by baseline 10% taxes on U.S. imports is the British Indian Ocean Territory, which is exclusively occupied by U.S. and U.K. military service personnel at the Diego Garcia base.
• Trump announced 10% tariffs on the U.K.

Go deeper: Trump's tariffs list is missing one big country: Russia

Editor's note: This story has been updated with details from a White House official and information on tariffs in other remote regions.