Grazing fees on public lands have changed little because
A. Political pressures ensure they remain high
B. Political pressures ensure they remain low
C. The public feels that the price is right
D. Livestock owners cannot afford higher fees
E. They remain at market value, so there is no reason to change them
Answer: B
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A) positive feedback loop. B) negative feedback loop. C) neither a positive or negative feedback loop.
The burning of coal releases sulfur dioxide into the atmosphere. However, smelting is a clean process that does not deposit sulfur dioxide
Indicate whether the statement is true or false
radiation from the Earth is mostly absorbed in the lower troposphere and ______ back towards.
a - scattered b - convected c - conducted d - reradiated e - reflected
Alfred Wegener was the first scientist to propose a previous connection between some of
the continental masses. Indicate whether the statement is true or false.