We did that for about a month in 2015; made it for Songkran. It was pretty great. Frustrating with time zones and car pollution, but otherwise solid. Ristr8to remains a favorite.
[0] https://www.washingtonpost.com/world/2019/05/07/northern-tha...
[1] https://www.kgw.com/mobile/article/weather/air-quality/portl...
For instance, I'd love to let my kid ride a bike to school. I don't because of cars (well, drivers, really). That's a form of pollution, in a sense.