Three years ago the Tucson Unified School District invested heavily in CNG-powered school buses, now the school district is change its tack with an $3 million diesel school bus order, the Arizona Daily Star reports:
… the CNG buses have drawn complaints from mechanics, who don’t like the engines as much as they do diesel, and from drivers, who don’t like the long trips to the airport fueling station … but the biggest reason behind the switch is that diesel is cleaning up its act. With the federal government next year instituting stringent clean-air requirements, the new generation of diesel buses spits out only a fraction of the tiny pieces of dust, soot and fumes that its older kin does. Such emissions are now on par with clean-burning CNG-fueled buses.
Tom Mulligan, the district’s transportation director, says given the improvements in diesel, the decision to switch makes financial sense. But Richard Kolodiej of NGVAmerica says that might not hold if diesel prices go back up, especially since districts can lock into natural gas prices for seven years. On the environmental side Patricia Monahan of the Union of Concerned Scientists says natural gas is still worth considering as a means to end petroleum independence and overall pollution reduction. But, she says:
“… I think school districts have a lot of hard decisions to make …I wouldn’t chastise the district for cutting costs, but there is an argument to still use natural gas.”
So what’s going on at your operation? Are you looking at CNG or propane? Is “green” diesel where it’s at?
Also on the alt-fuel radar this week, IC Bus will get $10 Million from the U.S. Department of Energy to develop and test the next generation plug-in hybrid school bus.
