Name four latin america countries where most of the precious metals (gold, silver, copper) are found.

The four Latin America countries where most of the precious metals (gold; silver; copper) are found includes; 
Mexico, Puerto Rico, Bolivia and chile
They all have a common physical features and that is they all have mountains.
The most abundant resource in Latin America north of the equator is oil, with most of it being in Mexico and Venezuela. 

Ithink the answer is pollution in the air steel made of iron and carbon