At first, slaves were used in the Caribbean as well as Central and South America. They worked on plantations producing sugar, coffee, rice, cotton and tobacco. The British also decided to use slaves in their North American colonies. As the number of plantations grew, farming became the main source of economic wealth for White farmers. More and more slaves were needed and a 'triangular trade' developed. Many European merchants made a financial fortune controlling the triangular trade making the most profit out of it.