Question

Mars One is a very complex project. What kinds of problems will make it difficult? What kinds of people, in terms of professions or areas of expertise, will be critical to the project?

Answer 1

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.