How do physical processes such as air circulation and precipitation affect humans

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century

How did the russian revolution impact world war l ?

The southern colonies practiced indentured servitude and slavery because cash crops such as tobacco and sugar required many workers. the fishing and shipping industries required many workers. imprisoned debtors were brought from africa to settle the colonies. indentured servitude and slavery were not allowed in the caribbean colonies.