Food, lifestyle.
For example when I was in DC, I only ate from some local South American fresh chicken place and some Trader Joe type place, because everything else was fast food. Even in the supermarket I stayed away from the over processed stuff. We still ban some US foods too, and have tighter regulations in places.
And I walked 30 minutes to the office, which was one straight road, but a lot of people drove or Uber’ed in. Basically I was doing the same stuff I was doing in the UK, but it was more difficult in the US. Like, some roads I could not cross, so I ended up running across them. The infrastructure is not built for mass public transportation, walking or biking.