If nonrenewable energy has so many negative effects, why is it so widely used?
What will be an ideal response?
Nonrenewable energy is relatively abundant and easily extracted and transported using well-understood technology. Most nonrenewable energy, like oil, has a high net useful energy yield. Also, it is artificially cheap as the price to consumers does not reflect the environmental impact.
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Glass is opaque to light with wave frequencies that
A. match its natural frequencies. B. are below its natural frequencies. C. both of these D. none of the above
About one-third of the annual surface runoff is ____, which we can generally count on as a source of freshwater from year to year.
A. reliable surface runoff B. transpiration C. embedded water D. virtual water E. artesian runoff
The general public typically perceives involuntary risks, such as nuclear weapons, a greater risk than voluntary risks, such as smoking.
Answer the following statement true (T) or false (F)
How is atmospheric nitrogen converted to a usable form in the biosphere?
A) Atmospheric nitrogen is directly available to plants and animals. B) Atmospheric nitrogen is completely unavailable to plants and animals and, as a result, synthetic fertilizers must be used. C) Bacteria within root nodules of legumes chemically combine the atmospheric nitrogen into nitrates and ammonia. D) It is absorbed into plants via stomata and converted within the plant to a usable form.