¿cuál era la actividad económica más importante en la época colonial?

Why did large numbers of african migrate to the americas

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

Explain why components that are naturally found in air can be considered air pollutants.