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You're counting emissions from a person's breathing as part of the vehicle's emissions?

xnx 25d ago
People take their salaries and buy food, clothes, heating and air conditioning, cars and fuel, and plane tickets, and furniture. All of those things generate emissions in their production and/or transportation. This is why dollars is such a good proxy for co2 emissions.
- NicuCalcea 25d ago
  Surely a person driving 18 people will emit less than each person driving themselves? I can see how dollars can be a proxy for macroeconomic stuff, for example by comparing countries, but it doesn't make much sense for comparing individual units of transport. I don't understand why we have to do napkin maths to guess what's more polluting. There is countless research showing buses emit less than individual cars per passenger per km, self-driving or not. And there's no reason buses can't be self-driving as well, if anything, them driving slower, on dedicated lanes and on fixed routes would make it much easier.
  - cyberax 25d ago
    > Surely a person driving 18 people will emit less than each person driving themselves? No. A person driving themselves does not create any _incremental_ CO2 emissions. They don't need a dedicated full-time position to do the driving. > There is countless research showing buses emit less than individual cars per passenger per km, self-driving or not. Care to share it? I actually read through most of highly cited articles in this area, and it's not at all so clear-cut. For example: https://ourworldindata.org/travel-carbon-footprint https://ourworldindata.org/travel-carbon-footprint
    - NicuCalcea 23d ago
      The very source you are providing is pretty clear to me. For cars, only hybrids and EVs are more efficient, and that is because it's comparing electric passenger cars with all buses (most of which still run on fossil fuels). There is no data for electric buses, but it's pretty intuitive to me that they would emit less per passenger kilometre than an electric car.

xnx 25d ago

People take their salaries and buy food, clothes, heating and air conditioning, cars and fuel, and plane tickets, and furniture. All of those things generate emissions in their production and/or transportation. This is why dollars is such a good proxy for co2 emissions.

NicuCalcea 25d ago
Surely a person driving 18 people will emit less than each person driving themselves? I can see how dollars can be a proxy for macroeconomic stuff, for example by comparing countries, but it doesn't make much sense for comparing individual units of transport. I don't understand why we have to do napkin maths to guess what's more polluting. There is countless research showing buses emit less than individual cars per passenger per km, self-driving or not. And there's no reason buses can't be self-driving as well, if anything, them driving slower, on dedicated lanes and on fixed routes would make it much easier.
- cyberax 25d ago
  > Surely a person driving 18 people will emit less than each person driving themselves? No. A person driving themselves does not create any _incremental_ CO2 emissions. They don't need a dedicated full-time position to do the driving. > There is countless research showing buses emit less than individual cars per passenger per km, self-driving or not. Care to share it? I actually read through most of highly cited articles in this area, and it's not at all so clear-cut. For example: https://ourworldindata.org/travel-carbon-footprint https://ourworldindata.org/travel-carbon-footprint
  - NicuCalcea 23d ago
    The very source you are providing is pretty clear to me. For cars, only hybrids and EVs are more efficient, and that is because it's comparing electric passenger cars with all buses (most of which still run on fossil fuels). There is no data for electric buses, but it's pretty intuitive to me that they would emit less per passenger kilometre than an electric car.