Toxic waste (hazardous waste) in landfills and dump sites can harm the environment but has little ...

Toxic waste (hazardous waste) in landfills and dump sites can harm the environment but has little impact on human health.
 
  Indicate whether the statement is true or false.

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The climate change that has occurred over the last 100 years is primarily due to human activities.
 
  Indicate whether the statement is true or false.

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Mrs. Smith is an only child. She has three daughters. If all three have three daughters, and each daughter has three daughters, then within four generations, Mrs. Smith would have produced 27 female descendants.
 
  Indicate whether the statement is true or false.

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Which naturally occurring odorless, colorless gas seeps into homes and is a leading cause of lung cancer?
 
  A) radon
  B) asbestos
  C) lead
  D) mold

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One in four animals is threatened with extinction because of population growth as a result of human activity.
 
  Indicate whether the statement is true or false.