____________________ is a mixture of gases that is approximately 50-90% methane (CH4).
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Q65: What is an advantage of geothermal power?
A)
Q65: _ produces fewer pollutants than burning coal,
Q66: Available deposits are called _,which are deposits
Q68: One way to save energy is through
Q69: The coal and electric utility industries have
Q71: What is a disadvantage of wind power?
A)
Q72: Wind can be thought of as an
Q73: What is a disadvantages of producing energy
Q74: Wind farms that are located _ are
Q75: What is the byproduct of combing hydrogen
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