Pearl Harbor was attacked by Japan on December 7, 1941. <span />
Europeans started to enslave Africans.
They started to use slaves instead of indentured servants, because the investment was better. Indentured servants only served for a few years, and then were granted freedom, while slaves were purchased and used for their entire lives. The investment of a slave was better than an indentured servant.
Sunlight and wind
oil and coal are non renewable, they can’t replenish themselves
