I never respond to such requests as your homework is your homework and no-one elses.
* What impact has human activity had on the area?
There's plenty of information on this on this site if you look, use the search function.
* What does the future hold for Antarctica?
* Why is Antarctica worth saving?
These are questions that I guess your teacher is hoping you will use your brain to answer by giving your opinion supported by some information you find. In both cases, no-one is going to give you the answer, you might find a cut-and-paste answer on the web, but I hope that you don't :neutral:
The informational pages on this web site have enough to answer almost any homework or assignment on Antarctica - I know this because plenty of people email me or leave messages to tell me so. If anything new arises I add extra informational pages - but not as an answer to any one specific question. You need to do some work and interpretation of your own.
p.s. this is a generic answer as well as specific as once the search engines pick the thread up, many reluctant students will visit it - the answer is the same - do your own homework! :mrgreen: