Living in the deep south for the last 34 years, I can’t imagine how people survived here without air conditioning. It must have been extremely uncomfortable as well as unhealthy. Today we enjoy the ability to manipulate our inside environment with better insulation and more efficient appliances. Air conditioners not only cool but also remove humidity from the air. This is essential when it is 95oF and 95% humidity outside. Passive cooling can and should be implemented when in an off-grid situation. In dry climates swamp coolers are effective in reducing temperature and increasing humidity.