What are the major sources of air pollutants in the United States?
A) agriculture and chemical processing
B) evaporation (especially in the Southwest) and desertification
C) hydropower and biomass consumption
D) deforestation and topsoil depletion
E) industry and transportation
E
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The infant mortality rate (IMR) is the annual number of ________
A) deaths of infants under 5 years of age, compared with total live births B) deaths of infants under 1 year of age, compared with total live births. C) serious illnesses of infants under 1 year of age, compared with total live births. D) serious illnesses of infants under 5 years of age, compared with total live births. E) children under the age of 5 who die from teenage births
Productivity in the tropics is: a. high, due to abundant sunshine, warm temperatures, and clear waters
b. low, due to a lack of nutrients. c. average, due to abundant sunshine and clear waters. d. average, due to warm temperatures.
TAO/TRITON is ________
What will be an ideal response?
If all of the stratospheric ozone suddenly disappeared, ________
A) plants would flourish B) insects would be the only organisms to survive C) Earth's surface would warm considerably D) there would be a dramatic decrease in skin cancers E) most life on Earth would cease to exist because of the amount of UV radiation penetrating the atmosphere