Retiring the big yellow diesel fueled buses that have taken young students to and from schools for many decades may take some time, but it looks like cleaner methods of powering school buses — primarily compressed natural gas and electrical energy sources — are destined to become the new standard for transit for school systems. President Biden’s infrastructure plans call for electrifying school buses in the U.S. within about a decade. With support of government policies and various incentives, Professor Ram Pendyala, a transportation engineer, professor and director of the School of Sustainable Engineering and the Built Environment, one of the six Fulton Schools, foresees the inevitability of school vehicles going green within a decade or two.