Got Questions

Q. How does a propane school bus affect emission levels?

Ryan Zic
Posted on June 14, 2018

All of today’s school buses are cleaner than they were a decade ago as the Environmental Protection Agency continues to set tougher emissions standards.

However, motor vehicles are a primary source of nitrogen oxides (NOx). According to a University of California Riverside study, diesel-fueled medium- and heavy-duty vehicles are the number one source of NOx emissions in almost every single metropolitan region in the U.S.

With three parts carbon and eight parts hydrogen, propane is a clean-burning, low-carbon fuel that will lower a school district’s carbon footprint. It takes four Blue Bird propane buses to emit as much NOx as one clean-diesel bus.

Nevada’s Washoe County School District’s 35 Blue Bird Vision Propane buses reduce nitrogen oxide emissions by 59,000 pounds and particulate matter by about 1,200 pounds each year when compared with conventional diesel-powered buses. The district’s 12 propane autogas Micro Bird G5 buses will eliminate 1.1 million pounds of carbon dioxide over the fleet’s life when compared with gasoline models.

Plus, with propane autogas school buses, students aren’t exposed to the harmful particulate matter in diesel exhaust, which is known to aggravate asthma and is identified as a carcinogen by the World Health Organization.

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