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Correct Answer: A) Warm, acidic water causes coral to bleach and then die.
Correct Answer: B) Cutting, burning.
Correct Answer: D) 1952.
Correct Answer: B) The stratosphere.
Correct Answer: A) People have contaminated, or dirtied an area with waste.
Correct Answer: B) Respiratory problems.
Correct Answer: C) 150, 000.
Correct Answer: C) Particulate matter.
Correct Answer: D) The burning of fossil fuels.
Correct Answer: D) Transportation, factories, power plants, and private homes.
Correct Answer: C) Human actions.
Correct Answer: D) Warm air above keeps cooler air at the surface from moving upward.
Correct Answer: E) Volcanoes.
Correct Answer: A) Aurora Borealis.
Correct Answer: C) CFCs.
Correct Answer: B) Humans.
Correct Answer: C) CO$_{2, }$CO, NO$_{2}$, SO$_{2}$.
Correct Answer: A) Weather.
Correct Answer: A) Nitrogen oxides.
Correct Answer: D) All of the above.
Correct Answer: C) Ozone.
Correct Answer: D) Nitrogen oxides and sulfur dioxide.
Correct Answer: D) Respiratory diseases in humans will increase.
Correct Answer: A) Car emissions.