Most of earth's dry air is made up of
a. carbon dioxide and oxygen.
b. nitrogen and argon.
c. nitrogen and oxygen.
d. oxygen and argon.

Advantages and disadvantages of mitigation and adaptation

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

The creation of the european union has had all of the following effects except