Part 1 of Essay
The principal problems now facing Mexico City are its overcrowding and overpopulation, its dangerous environment, its dwindling water supply, and its terrible air pollution. One of Mexico City's problems is that it has an enormous population that continues to rapidly increase every day. There are many people that move to ....

Part 2 of Essay
.... transport it from across the mountains. Not only does the city have to pipe water in, but it also has to pipe the sewage out of waste-filled areas. This would be a very expensive undertaking and could cost Mexico City a large amount of money. Mexico City's worsening air pollution is the most dangerous problem and health hazard presently facing the city. The air in the city is so polluted that at times the air quality exceeds 100 times the acceptable level. Thousands of factories and millions of vehicles are ....