Increased pollution. You usually won't find farms inside a city. It can be argued successfully that Mexico the country has a lower general education level the so-called developed nation yet the middle class 20 somethings in Mexico City are generally on a par with or above their peers in many parts of the world; Mexico City has several good universities. And of course there are plenty of places to buy food-supermarkets, convenience stores, local fresh markets and restaurants galore,
While pollution is a problem Mexico City has fallen from the top rankings for most polluted cities in recent years.