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12) The EPA's Air Quality Index measures all of the following EXCEPTA) carbon monoxide.B) natural gas.C) particulate matter.D) nitrogen dioxide.13) The key component of smog is14) Which of the following does NOT make smog more likely to form?
15) A gas or vapor that traps infrared radiation instead of allowing it to escape through the atmosphere is called a(n)16) The greenhouse effect contributes directly toA) acid rain.B) global warming.C) ecological homeostasis.D) smog.17) Levels of atmospheric greenhouse gases are rising in large part because of18) If the greenhouse effect does raise temperatures worldwide, it is predicted that all of the following will happen EXCEPT19) The ozone layer in the upper atmosphere20) The most obvious depletion of the ozone layer has occurred overA) Antarctica.B) the United States.C) the equator.D) Africa.21) Release of ________ into the atmosphere is the primary cause of the depletion of the ozone layer.
22) Of the following diseases, the thinning of the ozone layer is most likely to increase the incidence of23) Water is usually disinfected by using24) The water treatment that helps reduce tooth decay isA) filtration.B) disinfection.C) chlorination.D) fluoridation.25) Which of the following is TRUE about U.S. water systems?