Of the following greenhouse gases, which have actually decreased in atmospheric concentrations during the past 30 years?
A) Chlorofluorocarbons (CFCs) B) Nitrous oxides (N2O)
C) Methane (CH4 ) and carbon dioxide (CO2 ) D) HFCs
A
Environmental & Atmospheric Sciences
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The visual appearance of a choropleth map can be affected by:
A. number of classes B. classification method C. both of these are correct
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Which of the following has an acceptable dangling node?
A. a two-way street B. a dead-end street C. a street intersection D. none of these is correct
Environmental & Atmospheric Sciences
Isotopes are the forms of an element that differ from one another by having different ____.
A. atomic numbers B. numbers of electrons C. numbers of protons D. mass numbers E. electrical charges
Environmental & Atmospheric Sciences
Humanistic geographers view the body as the site of intentionality
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences