Which of the following actions is required for the recycling loop to be successful?
A. Genetically modified bacteria must be found to consume toxic components.
B. Consumers must purchase only products made in the United States.
C. Consumers and businesses must purchase products made from recycled materials.
D. Corporations must make more products from virgin (raw) materials.
Answer: C. Consumers and businesses must purchase products made from recycled materials.
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Hoover Dam was built in the 1930's on the Colorado River, and at that time was extremely important as an employment project
The United States was just coming out of the Great Depression and it was viewed as a life-saver by thousands of people across the country. Now this dam is 80 years old. Drawing from information in this chapter about aging dams, what is a severe problem that could be expected? What will be an ideal response
What happens when rocks oxidize near Earth's surface?
A) minerals in the rock release oxygen that can break down adjacent rocks B) oxygen combines with water to create weak acids that weather rocks C) minerals, especially those with iron, combine with oxygen D) oxygen combines with silica to make quartz
What direction would a gyre in the Southern Hemisphere flow towards?
a. Left b. Right c. Towards the equator d. Poleward
Water enters the soil in a process called ________, and then moves downward through the soil in a process called ________
A) throughfall; percolation B) percolation; infiltration C) infiltration; percolation D) percolation; throughfall