What is the major source of chlorofluorocarbons implicated in the thinning ozone layer?
a) Chemical chloroforms used in preservation
b) The burning of high sulfur coal
c) Refrigerants and aerosol can propellants
d) Fluoride treatment in municipal water systems
c) Refrigerants and aerosol can propellants
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What causes the subsidence that sometimes accompanies groundwater use? What will be an ideal response?
The zone of wastage is the portion of a glacier where ____________________ exceed ____________________
Fill in the blank(s) with correct word
Biomagnification is an especially important process in the concentration of ________ to toxic levels
Fill in the blank(s) with correct word
In many scientific disciplines, hypotheses are tested by direct laboratory experiments. Explain two reasons why direct laboratory experimentation is not always possible in geology
What will be an ideal response?