What is the most dangerous natural resource in latin America?

It depends on your definition of "dangerous". You mean to the health of those who extract it? To those who handle it during transformation into finished products? To the environment?

Some of the most dangerous in all three terms include gold and silver, which are extracted using cyanide, a very toxic poison. Other resources which are dangerous on their own right include asbestos, uranium and cobalt. Oil and natural gas are also dangerous, as both are highly flammable and spills are expensive to cleanup while being pretty harmful to the environment.