The port of houston is one of the busiest ports in the country. the u. s. department of energy gave this port $3.4 million to operate twenty heavy-duty hydrogen hybrid fuel cell powered trucks around the port. which is the most likely reason the u. s. government made such an investment? to produce more water to improve fueling stations to move more cargo to reduce harmful emissions

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.  

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.