They are trying to keep it beautiful. They only bring the supplies that they know they will need. This means there is less of a chance that they will have things left over. They do not leave their garbage on Antarctica when they leave. The garbage gets shipped back to their country with them.
Garbage is placed on airplanes or on boats and taken back to the other countries for disposal.
Tell students that explorers like Ann Bancroft and Liv Arnesen are very concerned about protecting Antarctica and keeping it clean and beautiful. Ask students why it may take more work for Ann and Liv, or other explorers, to keep Antarctica clean. Ann and Liv are skiing across Antarctica, not staying in one place. They are carrying all of their supplies with them. There are no garbage cans to throw garbage in and no restrooms along the way.