The Big Crush: By the year 2100, the world will be populated by over nine billion people, with more and more people moving into the cities and seeking jobs, even the farmers and other people who live in desolate areas, forcing many different people to move into cities due to a lack of profitable work. People would literally and figuratively breathe down each others necks, causing more and more societal problems. It is also known that if a certain concentration in a city reaches nearly the cities' max, the pollution will increase and the general state of life will decrease. Smog will pollute the airs and breathing in the air would be equivalent to smoking like a regular smoker, much like the way it is now in Mexico City. Rush hour would include at least 20 deaths a day and getting to work on time would be impossible. The sheer...