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?

Hydrogen fuel cell trucks can transport cargo while producing far fewer harmful air pollutants than conventional diesel trucks. Since the investment supports operating these trucks at a busy port, the most likely goal is to reduce harmful emissions, not simply produce water or move more cargo.

AI-written and checked against the verified answer.