During the 19th century, as populations grew and urban environments expanded, humans had less exposure to ________
A) air pollutants
B) natural environments
C) animals
D) water
E) chemicals
B
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Assuming that all other factors are equal, on a cold winter afternoon the amount of dissolved O2 in a lake will be
A) more than on a hot day because the decreased energy in colder water makes O2 molecules less likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day. B) less than on a hot day because the decreased energy in colder water makes O2 molecules more likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day. C) more than on a hot day because the decreased energy in colder water makes O2 molecules less likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day. D) less than on a hot day because the decreased energy in colder water makes O2 molecules more likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day.
Everything about a formal region is the same throughout the region
Indicate whether the statement is true or false.
Annual plant growth cycles can be observed in global CO2 data.
Answer the following statement true (T) or false (F)
During much of the year, ____ climates are characterized by low clouds, fog, and drizzle
a. marine b. tropical wet c. tropical wet-and-dry d. Mediterranean e. highland