PM10 (coarse particulate matter) levels in the United States have ________ between 1990 and 2015.
A. decreased by 39%
B. remained constant
C. decreased by 95%
D. increased slightly
Answer: A
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When Aldo Leopold said, "The first rule to intelligent tinkering is to save all the pieces." In terms of biodiversity he meant that we should
A. Not cause species to disappear B. Not interfere with nature C. Aldo Leopold did not intend to have this statement applied to biodiversity D. Not interfere with the disappearance of species E. Save records of all species that have disappeared
What are some of the causes of eustatic change to sea level? Include local possibilities of sea level change as well
In North America the highest potential for large tsunamis is in the coastal regions of ____
A) the Pacific Coast and Hawaii B) the Hudson Bay C) Louisiana D) the eastern seaboard
Midlatitude grasslands are found only in North America
Indicate whether the statement is true or false