At the beginning of the 1800s, most americans earned a living by farming.
a. true
b. false

56: 58 the assembly line was a system through which items were mass-produced in a flow.

What event occurred that led to the weakening of mikhail gorbachev's authority as leader of the soviet union? a. threats by president reagan against the soviet union b. gorbachev's announcement that he would never retire c. the attempted overthrow by fellow communists d. the removal of lenin's remains from red square

Migration the ability to meet current needs without reducing the ability to meet future needs 2. immigration the leaving of one's homeland to settle in a new place 3. migration a situation in which the birth rate is not sufficient to replace the existing population 4. overpopulation the movement of people to a new country 5. sustainable development the increase in the population of a city 6. underpopulation a situation in which resources are being used up at a faster rate than they can be replenished 7. unsustainable development a situation in which the number of people exceeds the available natural resources in an area 8. urbanization the movement of people from one place to another