The correct answer is to reduce harmful emissions.
Hydrogen is a chemical element with atomic number 1, this signifies that it exhibits one electron and one proton. Hydrogen gas (H2) is an odorless, colorless, highly combustible and tasteless gas. The hydrogen fuel refers to a zero-emission fuel that discharges no waste components, which can pollute the environment, this is the most likely reason that the US government made such an investment.