The process in which pollutants dissolve and filter through soil is known as :

The process in which pollutants dissolve and filter through soil is known as
 
  A) erosion.
  B) leaching.
  C) filtering.
  D) deposition.

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Which of the following is a form of pollution created when vehicle exhaust interacts with sunlight?
 
  A) Acid deposition
  B) Particulate matter
  C) Smog
  D) Sulfur dioxide

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The physical and biological components of an environment and the relationships between them make up a(n)
 
  A) species.
  B) biosphere.
  C) atmosphere.
  D) ecosystem.

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Carbon-based materials that are used to generate energy are known as
 
  A) fossil fuels.
  B) natural resources.
  C) clean energy.
  D) renewable resources.

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If throughout a population, each couple on average has two and only two children, the result is
 
  A) overpopulation.
  B) depletion of resources.
  C) zero population growth.
  D) limited population growth.