PROBLEM IN BIG CITIES

One of the most serious problem in big cities is traffic jam. Traffic jam is caused by thousand of cars within the city limits besides, it produces polluted.

One example, of this problem has presented in something cities of Colombia such as Bogota, Medellin and Cali. Bogota is the most contaminated of all, though, Medellin is more contaminated than Cali but, Cali is smaller than Medellin and Bogota has more inhabitants than Medellin. However, Bogota isn´t as helpfull people as Medellin.

To conclude, that the government should pay more money to control this, as a result, this mamouth problem must be solve before it gets worse.