Buses and cars using fuel cells are
A) not yet possible because the technology to safely store hydrogen is still not resolved.
B) not yet available because the fuel cell generates unsafe levels of heat.
C) still inefficient, mostly because the fuel cells are large and heavy.
D) already in use and ready for commercial production.
D
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The Great Lakes are large enough to affect the climate of the surrounding area
Indicate whether the statement is true or false
The plastic-derived decking materials used in constructing many homes and commercial buildings best illustrate which of the following methods to reduce MSW?
A) Source reduction B) Composting C) Recycling D) WTE disposal
Your environmental science instructor tells your class that you will have an extra credit question on your next exam based on a talk to be given by a scholar visiting campus to present his research on alternative energy sources
The night before the talk, you pull an all-nighter writing a research report. You attend the talk but immediately doze off. Afterward, all you remember about the talk is that the speaker said something about working with turbines. On your next environmental science exam, your instructor asks you about the focus of the speaker's research, with the following answer choices. Which one is most likely to be the correct answer? A) Photovoltaic systems B) Geothermal heat pumps C) Biodiesel production D) Concentrated solar thermal systems
_______ __________ the amount of biological productive land needed to sustain a person's consumption and absorb his or her wastes-for every acre needed to support an average Ethiopian, 69 acres are needed to support an average American
Fill in the blank(s) with correct word