How can human activity lead to air and water pollution?

Describe how the ongoing sanitation and water crisis affects the economy and health of people in the subregion.

How can water pollution be prevented?

Name the term for “a class of nutrients that contain carbon and are needed in small amounts to maintain health and allow growth.”

Note the position of City $X$. In 24 hours, how is the weather at City $X$ likely to be different? (1) Atmospheric pressure will be higher and the relative humidity will be higher. (2) Atmospheric pressure will be higher and the relative humidity will be lower. (3) Atmospheric pressure will be lower and the relative humidity will be higher. (4) Atmospheric pressure will be lower and the relative humidity will be lower.

Which diagram best represents this weather system 24 hours before the diagram above?

List six ways to prevent or reduce water pollution. List five things you can do to help reduce water pollution. What are this chapter's three big ideas? Explain how we can use the three scientific principles of sustainability to prevent and reduce water pollution.

What caused the formation of Front $Y$ ? (1) Weather fronts move across the United States from east to west. (2) Warm fronts stay in the same position until they dissolve. (3) Cold fronts usually travel faster than warm fronts. (4) Warm air is more dense that cold air.

How is the U.S. economy an important part of the global economy?

What makes the United States and Canada leading industrial nations? Think about: available resources, oceans and waterways.

Use your graphic organizer to list the types of resources that need to be protected in the United States.

How is the U.S. economy an important part of the global economy?

How has immigration influenced the culture of the United Stales?

What is a keystone species? How does the removal of a keystone species affect the number of species in a community? Why aren’t all species in a community considered keystone species?