Mexico City's location in a valley combined with its large population contributes MOST to which of these environmental problems? A) smog

B) crime

C) water pollution

D) nuclear contamination

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

are there actual statements because if not my answer would be: that using the five senses the author can create a sense of worth in an object to appeal to the reader and create meaning.

answer; earthquake;