The Delaney clause of the FFDCA became increasingly problematic because
A) of the introduction of new pesticides.
B) organic farming required the elimination of all traces of pesticides from certified organic products.
C) more sensitive analytical chemical techniques could detect previously unknown traces of pesticides.
D) humans appear to be more and more sensitive to carcinogenic compounds.
C
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A front is a boundary between two different types of air, such as warm air and cold air
Indicate whether the statement is true or false.
The type of rock shown in this photograph is
A. shale. B. breccia. C. sandstone. D. conglomerate.
In the midlatitudes, most rain results from melted snow that formed from the ice crystal process. Indicate whether the statement is true or false
Approximately what percentage of incoming solar radiation is absorbed by the surface of the Earth?
A. 47% B. 31% C. 100% D. 4% E. 80%