Yes, Pollution.
No, Scientific research and data on wildlife and climate change.
You'll find both there. Some scientists ski, and there is some cross-country skiing in Antarctica. Some cross-country skiers in Antarctica are not scientists.
Scientists and researchers in Antarctica live a lifestyle that is supported by their government. This lifestyle includes the import of everything consumed and used and the export of everything wasted and expired. There is no 'sustainability' in Antarctica such as is expected on more productive continents.
People working in support of science and scientists visit Antarctica -- some for up to two years -- to learn more about the health of planet earth. There is no permanent population in Antarctica.
Antarctica's greatest natural resource is data that scientists study to learn more about the health of planet earth.
No, because Tour Operators are bringing uneducated humans to Antarctica which are dumping litter etc, which ruins the effects the wildlife. Also, the ships that Tour Operators use are anchoring into vulnerable areas in Antarctica which obviously destroys that site. Scientists, hardly damage the environment in Antarctica.
Reconstruction is more good.
harm
In scientific research stations, to do tests and discover more about this unknown continent
Yes, imperialism did do more harm than good in Afria.
Antarctica's only usable resource -- according to the Antarctic Treaty -- is data, which scientists collect and analyse to learn more about the health of planet earth.
Disciplines pursued may include biology, botany, atmospherics, glaciology, psychology, geology, astronomy and more. Every funded scientist asks questions based on a better understanding of the health of planet earth.
Before what time period? No people have never lived in Antarctica. Scientists go on expeditions there but don't stay for more than a few months.