Oil Sands Are Actually Asphalt-Cemented Sand or Sandstone Deposits

Q49: A resource is any geologic material that

Q50: At the current rate of consumption, United

Q51: Most of the easily recoverable uranium in

Q52: The _ resources include building stones and

Q53: Petroleum, natural gas and propane are all

Q55: Hydrothermal fluids are the most important source

Q56: In 1900 more than _ percent of

Q57: _ resources enable us to create the

Q58: The more carbon, the more combustible (economically

Q59: Counting tar sands, _ has the second