Using the above map, observe that in the following countries, less than half of the people live in urban areas:
Answer: Niger, Chad, the Central African Republic, Kenya, Tanzania, and China.
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The word "smog" is a combination of the words "fog" and "smoke," but actual photochemical smog
has little direct relationship with either smoke or fog. Indicate whether the statement is true or false.
Which of the following are primary pollutants that frequently occur undetected in homes?
A) Radon and carbon monoxide B) Soot, smoke, and salt aerosols C) Peroxyacetyl nitrate and sulfur dioxide D) Volatile organic compounds and peroxyacetyl nitrate
Which compound does not serve as a pigment in phytoplankton?
A. phycoerythrin B. chlorophyll c C. hemoglobin D. chlorophyll a E. fucoxanthin
The most abundant greenhouse gas in Earth's current atmosphere is
a. ?carbon dioxide (CO2). b. ?nitrous oxide (N2O). c. ?water vapor (H2O). d. ?methane (CH4). e. ?chlorofluorocarbons (CFCs).