Scientists are trying to reduce the amounts of carbon dioxide and methane that enter the atmosphere. Which statement explains what will most likely happen as a result of these efforts? These efforts will cause Earth’s average temperature to increase. These efforts will decrease the amount of heat that the atmosphere traps. These efforts will reduce the amount of sunlight that reflects off the clouds. These efforts will allow more thermal energy to enter the atmosphere.

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population