Exam 15: Population, Urbanization, And The Environment

Demographers study all of the following,except

Review the three population pyramids on page 296 of the text.What can these age-sex pyramids tell us about a country's past,present,and future? What are the problems that each country may face in 2025? In 2050?

During stage _____ of the demographic transition,the death rate begins to drop because of improvements in health care,sanitation,and nutrition.

Of the 700 million adults who say they would like to relocate permanently to another country if they could,approximately _____ percent would like to move to the U.S.

In the early 1970s,Congress passed _____ to eliminate water pollution.

Countries like China and India have skewed sex ratios largely because of

Air pollution can lead to the _____ effect,a rise in the earth's temperature due to atmospheric gases that allow the sun's light to enter,but traps the heat.

The federal government has enforced the Clean Water Act rigorously.