What would happen to ozone levels if stratospheric nitric acid levels increased?
A. decrease
B. increase
C. no change
Answer: A
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Even if we immediately halt all new releases of ozone depleting chemicals, the ozone layer can never be restored to its pre-1950s levels.
Answer the following statement true (T) or false (F)
A substance most commonly emits heat energy by the process of
A. radiation. B. convection. C. conduction. D. none of the above
The type of front formed by the merger of a cold front and warm front is termed a(n) ____
a. occluded front b. advection front c. stationary front d. polar front
Urban is defined by the U.S. Census Bureau as ________
A) areas where patches of commercial and residential developments are interspersed in a matrix of rural land B) a large central city and adjacent communities C) the parts of a metropolitan area located outside the central city D) an area where the average population density is at least 500 people per square mile E) an area with more than 10 million inhabitants