Many developed nations have their economies closely tied to imported fossil fuels. One important consideration for those nations is that ________
A) their economy will only improve if the price of fossil fuels increases
B) as supplies decrease, fossil fuels decline in price
C) if energy conservation is put into place, the cost of fossil fuels will increase
D) their economy can be disrupted by the events and decisions made in fuel exporting nations
E) if energy conservation is put into place, the cost of fossil fuels will decrease
D
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The ____________________ principle in evaluating environmental policies states that we should make decisions that help to prevent a problem from occurring or becoming worse.
Fill in the blank(s) with the appropriate word(s).
Fossils are:a
useful for reconstructing past environmental conditions. b. evidence that evolution has occurred. c. evidence that Earth has a long history predating humans. d. the remains or traces of once-living organisms. e. all of these
In general, biodiversity is
A) fairly evenly spread among all of the major groups of animals and plants. B) accurately quantified for most ecosystems, especially in tropical regions. C) 75% plant species and 25% animal species. D) declining in the United States and around the world.
A species can withstand a wide range of pH as an adult but the juveniles can only withstand a narrow range of pH. The abiotic factor, pH, would best be described as a
A. Intolerance factor B. Physical factor C. Stress factor D. Critical factor E. Tolerance limit