The term MOST-Likely used to describe an ideal fuel, that produces no emissions other than water and carbon dioxide is:

Question

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Hydrogen, when used as a fuel, combines with oxygen during the combustion process to produce water (H2O) as the only emission, making it an ideal fuel in terms of emissions. While it may produce trace amounts of other emissions depending on the method of hydrogen production and the purity of the hydrogen used, it is widely recognized for its potential to emit only water when used in a fuel cell, for example.

The Term MOST-Likely Used to Describe an Ideal Fuel, That