When farmland is paved over by urban sprawl, the amount of fertile __________ is made unavailable for future use.
Fill in the blank(s) with the appropriate word(s).
topsoil
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A fixed volcanic hot spot on Earth tends to produce a _______ on a moving plate.
Fill in the blank(s) with the appropriate word(s).
Water not found in oceans accounts for ________ percent of the world's total water
A) 0.25 B) 2.8 C) 28 D) 56 E) 74
The largest source of oil to the world ocean is through ____________. Fill in the blank(s) with the appropriate word(s)
The 2014 Panel on Climate Change (IPCC) reported that global climate change is
A) certain and that anthropogenic activities are a major factor. B) likely and it is possible that humans are to blame. C) happening in some regions of the world and in some places people may be to blame. D) still unclear and the evidence and the causes of change require additional studies.