Of the following campus sustainability efforts, which one seems to be the most popular?
A) replacing inefficient lighting
B) recycling
C) pesticide reduction
D) habitat restoration
E) LEED-certification buildings
Answer: B
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Which of the following describes how the sky would appear during the day, if the Earth did not have an atmosphere?
A. black B. red C. blue D. white
a) In what kind of bonds are electrons shared in a common pool? b) In what kind of bonds are electrons are transferred between atoms? c) In what kind of bonds are electrons shared between two atoms?
a. a) metallic, b) ionic, c) covalent b. a) covalent, b) metallic, c) ionic c. a) metallic, b) covalent, c) ionic d. a) ionic, b) covalent, c) metallic e. a) covalent, b) ionic, c) metallic
By what means do we know that greenhouse gas concentrations have varied quite dramatically over the geologic record?
A. carbon isotopes B. ice cores C. tree rings D. oxygen isotopes
Photochemical smog can most easily reduced by a drop in emissions of ____.
A. carbon monoxide B. nitrous oxides C. ozone emissions D. water E. PANs