The _____ in the earth's stratosphere is seasonally centered over Antarctica, but thanks to the Montreal Protocol it is currently shrinking
a. greenhouse effect
b. ozone hole
c. ice cap
d. aurora borealis
e. magnetic pole
b
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Describe the four parameters that can change the appearance of a 3-D view.
What will be an ideal response?
Halos are associated with
A) stratus clouds. B) thunderstorms. C) cumulus clouds. D) cirrostratus clouds.
Water diversion and irrigation has allowed humans to grow crops in areas where natural supplies have been limited. A major challenge that exists in these regions has been ________
A) high pesticide use B) soil erosion C) salinization of soils D) low crop diversity E) high trophic-level efficiency
A major concern with natural gas demand is ________
A) limited use of the fossil fuel B) lack of appropriate storage C) low supply D) lack of greenhouse gas emission E) transportation