Of the available policy options regarding eventual conversion to renewable energy sources, environmentalists would probably prefer that ________
A) we pass laws immediately banning the use of fossil fuels
B) we prepare for a gradual changeover by slowly increasing funding and putting alternative energy resources into place over the next 100 years
C) we pass laws immediately banning the exploration and development of further fossil fuel resources
D) we encourage, with subsidies, tax rebates, and grants, the rapid development and widespread use of renewable alternative energy resources
E) we plan for the switch to renewable energy sources, but not implement any plans until all fossil fuels have been depleted
D
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A softball is launched straight upward at 30 m/s. If air resistance can be neglected, the time to reach its maximum height is
A. more than 6 s. B. 6 s. C. 3 s. D. none of the above
Which of the following is a residual soil?
a. one developed on river gravel b. one developed on granite c. one developed on sand dunes d. one developed on volcanic ash e. one developed on glacial dust
The single most effective agent of chemical weathering at Earth's surface is
A. water H2O B. carbonic acid H2CO3 C. hydrochloric acid HCl D. carbon dioxide CO2
The pH scale is a quantitative representation of the relative amounts of ________
A) hydrogen and hydroxyl ions in solution B) hydrogen and polar water molecules in solution C) water and carbon dioxide molecules in solution D) hydrogen and oxygen ions in solution E) alkaline and basic ions in solution