The Tri Cities Regional Airport Is Getting Greener. A Special Grant Will Be Used To Reduce Emissions. The 121-Thousand Dollars Will Be Used To Purchase Two Pieces Of Ground Equipment That Will Run On Electricity. A Tug And Conveyer Truck Will Replace Two Older Diesel And Gasoline Burning Machines. In Addition To Being More Energy Efficient, The New Equipment Is Expected To Cost Less To Operate. Airport Manager Patrick Wilson Said The New Machines Are Expected To Reduce Co2 Emissions At The Airport By About 64 Tons Each Year.