Identify specific ways in which the transportation and electricity generating sectors could reduce and/or conserve energy in an effort to become more sustainable
What will be an ideal response?
Transportation: Currently, the combustion of oil-derived fuels accounts for 31% of all human-caused greenhouse gas emissions. The use of electric or hybrid cars, and increasing the opportunities for buses and other mass transit options that are more energy efficient, are options moving us in the direction of a more sustainable transportation future. With higher gasoline prices and more stringent regulatory standards being instituted worldwide, incentives are being created for the production of more fuel-efficient vehicles and vehicles powered by alternative energy sources.
Electricity: The existing system of demand-driven generation and distribution of electricity is generally agreed to be wasteful and inefficient. Newer smart grid systems in which real-time pricing is employed (based on consumer high-demand times) and consumers are alerted to when "rush hour" demand periods are occurring, allows consumers to curtail their use and actually consider their electricity consumption in a more realistic manner. With smart grid systems, homes with solar panels would be able to sell their excess solar power back to the grid, or use batteries to store electricity purchased during slack hours for use at peak times.
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Animal testing
A. extrapolates from low dose levels to high dose levels. B. extrapolates from test animals to humans. C. is noncontroversial. D. usually involves low dose levels. E. always involves high dose levels.
The ____ in the human eye allow(s) for the perception of colors in the visible light spectrum
A) iris B) cones C) rods D) cornea
Air resistance acting on a fast-moving football shortens its
A. maximum height. B. range. C. both of these D. none of the above
Which of the following is true about how weathering affects fractured rocks?
A. Preferential weathering along fractures can cause blocks to become rounded. B. Weathering affects rocks from the outside in, forming an outer weathered zone or rind. C. Weathering attacks corners from three sides and so these are preferentially removed. D. All of these choices are correct.