I would say he was happy and worried at the same time. Tremendous relief was brought to him as well as fear because of her/the situation.
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.
Answer:
A limerick is a form of verse, usually humorous and frequently rude
Explanation:
Topic, audience and purpose