from horses to cars

a fast transition happening in the 20’s, one day you are stepping on manure the day after you are chocking in exhaust agses (getting mad at lead ill happen later) From this paper https://www.researchgate.net/publication/236202800_An_age_structured_demographic_theory_of_technological_change/figures?lo=1

If I find more data and charts on this transition I will put them down here.

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