Car versus Bus carbon emissions
by Derek Zumsteg
I came across something online that claimed that diesel buses emit 200x the pollution of a normal passenger car. I looked into this, read some studies, and it’s not true.
The average vehicle on the road emits ~1# of CO2/mile (it’s higher for light trucks, lower for cars, but it works out quite well). I looked up some testing data, and a late-90s diesel bus on low-sulfur fuel (no trap, none of the new cool technology) puts out ~6.4# CO2/mile.
So an older diesel bus = about six cars, CO2-wise.
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