Of the following, ________ is not yet regulated by the EPA
A) lead
B) ozone
C) sulfur and nitrogen oxides
D) carbon dioxide
E) carbon monoxide
D
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All silicate minerals have ________ in common. Fill in the blank(s) with the appropriate word(s)
Which of the following best illustrates sustainability?
A) Transitioning from traditional to renewable sources of energy B) Constructing coal mines that do not require extensive surface excavations C) Upgrading or replacing computers every few years to improve performance D) Using an ethanol-gasoline blend in a vehicle instead of pure gasoline
The observation that one subtropical boundary current is faster, narrower, and deeper than its counterparts is an example of which of the following?
A) Eastern intensification B) Ekman transport C) Equatorial upwelling D) Geostrophic current E) Western intensification
The energy content and biomass of ________ is lowest in a terrestrial food web
A) producers B) primary consumers C) top carnivores D) small carnivores such as spiders and lizards E) detritivores and decomposers