I think "pay attention to what helps you get through hard times" sounds relevant
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.
A dust storm is a very forceful cloud of dust that can result in stuff covered in dust like anything and pretty scary
It is a run-on sentence. You have a complete sentence (verb and a noun), I like chicken, and then you have another complete sentence, I hate broccoli. If you had put an and between these two sentences you would have had a compound sentence. Hopefully this helps.
I'd go with However because it is hot, BUT they can't complain. It's the most logical one
However is just another word for BUT.
