Well some of them are probably real life ones like, <span>climate change, pollution, </span>environmental<span> degradation, and resource depletion etc.</span>
E. It is a process in which steps can be repeated as needed.
Cunning is the word i guess...
Try this summary of common sense on spark notes it helped me when i had to do similar questions http://www.sparknotes.com/lit/commonsense/summary.html
