SF should ditch dirty diesel muni buses & replace them w clean battery electric powered buses. Read all about it. sfexaminer.com/cities-lead-e…
3
5
1
7
getting more people out of their cars and onto Muni is better for air quality and climate change than worrying about the buses themselves.
3
5
when it comes to local air quality, you really do need to do something about buses.
3
4
Totally agree. Diesel buses and truck are about 4% of traffic in CA & about 25% of air pollution from vehicles.
2
2
3
when you say 4% of traffic do you mean 4% of registered vehicles or 4% of miles driven?
1
Worth noting that a huge amount of vehicle-created particulate matter comes from brakes and tires, not combustion. EVs don't help there.
2
2
see sciencedirect.com/science/ar…, 85% of particulates are non-exhaust emissions.
1
1
I prefer to not think of particulates from BART trains braking.
3
2
I recall seeing particularly bad things about PM2.5 and/or PM10 levels in some of the big RER stations (Auber, Châtelet).
2
1
jealous of anywhere with enough trains that this is a problem
1
2
Replying to @eean @hanlonbt @khuey_ @josefow @woolie
The PM10 levels quoted in ratp.fr/en/groupe-ratp/envir… range from "Moderately Polluted" to "Beyond Index" based on stimulatedemissions.wordpres…

Sep 14, 2017 · 9:45 PM UTC
1