While the article is specifically looking at the effects of the transition to DST, it references the fact that there are adverse effects of time zones besides j

While the article is specifically looking at the effects of the transition to DST, it references the fact that there are adverse effects of time zones besides just the transition or the use of cars. Here is one of their references: https://www.researchgate.net/profile/Mikhail_Borisenkov/publication/49752430_Latitude_of_Residence_and_Position_in_Time_Zone_are_Predictors_of_Cancer_Incidence_Cancer_Mortality_and_Life_Expectancy_at_Birth/links/0912f503c9f6283dc3000000/Latitude-of-Residence-and-Position-in-Time-Zone-are-Predictors-of-Cancer-Incidence-Cancer-Mortality-and-Life-Expectancy-at-Birth.pdf https://www.researchgate.net/profile/Mikhail_Borisenkov/publ... Others have also attempted to estimate the amount of sleep of people in eastern vs western edges of time zones and they have found it to be some 20 minutes.