Re:We need to adopt a no-commute culture
by mehrdadn on Thursday December 12, 2019 @04:57PM
(#21776986)
Interesting... I just learned N2O is 300x worse than CO2. I don't know how to make a better comparison then. Some numbers I can find:
"Aircraft engine emissions are roughly composed of about 70 percent CO2, a little less than 30 percent H2O, and less than 1 percent each of NOx, CO, SOx, VOC, particulates, and other trace components including HAPs." [1]
For gasoline the ratio seems to be 51% CO2, 47% H2O, and 0.9% nitrogen oxides, and 1.3% other stuff (excludes nitrogen). [2]
Water vapor isn't considered to be relevant when calculating CO2 equivalents so we can ignore that. [3]
But I'm not sure how much the difference in NOx contribution is... given ground level emissions aren't the same as high-altitude and such.
On the face of it it seems unlikely to me that the non-CO2 components would tip things in the other direction, but I'd definitely welcome better numbers...
"Aircraft engine emissions are roughly composed of about 70 percent CO2, a little less than 30 percent H2O, and less than 1 percent each of NOx, CO, SOx, VOC, particulates, and other trace components including HAPs." [1]
For gasoline the ratio seems to be 51% CO2, 47% H2O, and 0.9% nitrogen oxides, and 1.3% other stuff (excludes nitrogen). [2]
Water vapor isn't considered to be relevant when calculating CO2 equivalents so we can ignore that. [3]
But I'm not sure how much the difference in NOx contribution is... given ground level emissions aren't the same as high-altitude and such.
On the face of it it seems unlikely to me that the non-CO2 components would tip things in the other direction, but I'd definitely welcome better numbers...
[1] https://www.faa.gov/regulations_policies/policy_guidance/env...
[2] https://en.wikipedia.org/wiki/Exhaust_gas#Spark-ignition_and...
[3] https://climatechangeconnection.org/emissions/co2-equivalent...