It's apples and oranges. Comparing the carbon emissions of a truck, as well as the significant airborne particles from the road being torn up by said truck[1] t

It's apples and oranges. Comparing the carbon emissions of a truck, as well as the significant airborne particles from the road being torn up by said truck[1] to a biological entity, probably producing more methane than CO or CO2. I recall hearing that weight's effect on a road's wear and tear is polynomial rather than linear, so trucks almost certainly lead to more air pollution than horses ever did. There are also a multitude of incredibly hazardous ingredients in tires, something that horses never had. [2] [1] https://urbanmilwaukee.com/2017/06/22/murphys-law-how-trucks-destroy-our-roads/ https://urbanmilwaukee.com/2017/06/22/murphys-law-how-trucks... [2] https://www.nbcnews.com/storyline/artificial-turf-debate/rubber-mulch-safe-surface-your-childs-playground-n258586 https://www.nbcnews.com/storyline/artificial-turf-debate/rub...