Answer:
The cost of production and using more efficient resources
What table? you didn’t attach anything?
The answer is C. (0,1). I believe.
Natural gas is comprised of methane with small amounts of ethane,propane,butane and pentane.
The simpler molecular structure of natural gas enables a clean burn, so it's combustion does not produce solid particles or sulpher. It is used for heating,cooking,electricity generation and fuel for some cars.
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