The elimination of pollution caused by fossil fuels - When hydrogen is used in a fuel cell to create power, it is a completely clean technology. The only byproduct is water. ... Distributed production - Hydrogen can be produced anywhere that you have electricity and water.
the benefit of using hydrogen combustion over fossil fuel combustion is that it releases fewer emissions-water is the only major byproduct. No carbon dioxide is emitted, and nitrogen oxides, produced by a reaction with the nitrogen in the air, can be significantly lower than with the combustion of fossil fuels.
Mainly to make life easier. if one layer changes than scientists don't need to change all of their data. it also helps keep organized. hope this helped ebs02 :)