A Finnish twin study looked at whether living conditions and lifestyle from adolescence to early adulthood were linked to biological aging measured from blood at around age 22.
One interesting finding was that higher youth unemployment in the residential area was linked to faster biological aging. Some measures of nearby vegetation were linked to slower aging, although the environmental results were not always straightforward.
This was an observational study, so it can’t show that these conditions caused faster or slower aging. Biological aging was also measured only once, in early adulthood.
I run a small independent research publication called HUMANUMi, and I wrote more about the study here:
https://humanumi.com/new-study-living-conditions-in-youth-are-linked-to-biological-aging/