Santiago is the capital and the largest city of Chile. Just months after it was founded on the banks of the Mapocho River by Spanish conquistadors, the settlement was nearly wiped out by the indigenous Mapuche peoples. Today, it is one of the largest cities in South America, having survived the 1647 earthquake that leveled the city, frequent flooding from the Mapocho, and a number of other calamities. What meteorological phenomenon traps smog in the city? Discuss
Source: The Free Dictionary