Urban heat islands can cause an increase in pollution, which is very harmful to people’s health.
a. heat
b. ozone
c. runoff
d. water

Eastern europe’s population growth can be attributed to these factors. select all that apply migration

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

Which of the following factors is not used to measure a country’s standard of living? a.) life expectancy b.)educational levels c.)divorce rates d.) gross income