Active cooling is too expensive and too unreliable for most of the human population. It's cheaper to pour a concrete slab foundation for thermal mass and/or cle

Active cooling is too expensive and too unreliable for most of the human population. It's cheaper to pour a concrete slab foundation for thermal mass and/or clear the airflow beneath the house, plant some trees, and insulate a roof than it is to install an AC and run it every summer. Plus, if there's a power outage but you live in a house that's naturally cool, the heat won't reach unlivable levels. Hot weather can set off cascading failures in infrastructure: demand rises as everyone's AC kicks in, equipment fails in the heat, fires start, workers at power plants find it difficult to cope with the heat, etc. Passive cooling increases the resilience of the population.