Copper Mine smoke coming out of a stack in the distance. General industrial landscape.

Copper Mine with smoke coming out of a stack in the distance.

Copper Mine with smoke coming out of stacks in the distance.

Man exhaling smoke from cigarette.

Smoke rising from the volcano as it erupts above the tree lined base with dust surrounding the summit

Oil fields

Sugar train traveling through the country with black smoke pouring from the engine

Train transporting sugar cane with plumes of black smoke pouring from the engine