What is Clean Diesel?

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September 28, 2021   |   Heavy Duty Trucking


Where to Now for Diesels?

Thanks to the introduction of cleaner fuels, advanced engine technology and particulate filters, both PM (particulate matter, aka soot) and NOx (nitrogen oxides) emissions have dropped by 98% since 1988. Diesel-related NOx emissions dropped by more than 40% between 2007 and 2017, while fine particle emissions (PM 2.5) from diesel engines declined by over 230,000 tons between 2008 and 2017, according to the Diesel Technology Forum.

The federal Environmental Protection Agency says mobile sources account for just under 5% of the fine particle emissions inventory. Wildfires are the largest source of emissions making up 43%, followed by dust from unpaved roads and rubber particles scrubbed from tires. But I digress.

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