As for the first part, Cost, Radiation exposure to humans, No water or heat, and unfit soil. As for the second, Astronomers, Botanists, and obviously your fair share of rocket scientists and math matitions for the way up.
Peace is to war as life is to death, one can not exist without the other but they both make each other better.
Answer:
Malala Day in honor of the young woman who has been a prominent activist for female education since her early teens. For a girl at a young age she couldn't go to school due to her nationality.
Your answer would be A, hope this helps : D
