When a population pyramid has a broad base and a narrow top, what does that likely indicate?
A) an inadequate health care system
B) a developing country
C) a developed country
D) outmigration
E) urbanization
B
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Global urbanization is increasing at a rapid pace.
Indicate whether the statement is true or false.
The greatest human impact on the carbon cycle has been through ________
A) use of synthetic fertilizers B) increased respiration of the exponentially growing human population C) mining of limestone (calcium carbonate) D) combustion of fossil fuels E) depletion of aquifers
North American glaciations used to be described in four episodes. However, two of those episode names, the Kansan and Nebraskan, are no longer used. What evidence did scientists use to redefine the glacial history on the North American continent?
What will be an ideal response?
What is a growing concern related to sea level rise?
A) deforestation as salt in the atmosphere increases B) vanishing land near lakes and rivers C) fish migrating earlier than usual D) migrating birds as salt in the atmosphere increases E) eroding shorelines in coastal areas