Which of the following best describes air pollution?
A) Both natural and anthropogenic gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans.
B) Solely anthropogenic gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans.
C) Solely natural gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans.
D) A distinct class of gases, particles, and other substances that the EPA has deemed worthy of regulating.
A
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The reason that the Moon takes on a crescent shape each month has to do with the
A. Earth's shadow. B. Sun's position. C. both of these D. neither of these
Which of the following statements correctly shows the relationship between the ideas of climate change and global warming?
A. Climate change is really the same as global warming. B. Climate change is a logical outcome of global warming. C. Climate change leads to global warming. D. None of these statements is correct.
The Sentinel missions of the European Space Agency offer both active and passive satellite data.
Answer the following statement true (T) or false (F)
The tropopause is the boundary between ________
the troposphere and the stratosphere tropical and polar air masses the troposphere and mesosphere two layers of high ozone concentration