I'm skeptical of that as well. It's my understanding that the Urban Heat Island effect is from roads and structures lowering albedo and absorbing more solar ene

I'm skeptical of that as well. It's my understanding that the Urban Heat Island effect is from roads and structures lowering albedo and absorbing more solar energy. https://www.epa.gov/heatislands https://www.epa.gov/heatislands https://www.heat.gov/pages/urban-heat-islands https://www.heat.gov/pages/urban-heat-islands https://www.annualreviews.org/content/journals/10.1146/annurev-environ-102014-021155 https://www.annualreviews.org/content/journals/10.1146/annur... A few of these do mention waste energy, but it seems to be a relatively small factor. And of waste energy, I would imagine that cars are themselves a somewhat small factor, compared to electric and natural gas usage.