permaculture

[Marimike6@cs.com]

Prevailing breezes above roof level are frequently as much as 15-20 degrees 
cooler than ground level air. In Pakistan for the past 3,000 years people 
have 
put tall vents atop their homes, with the openings angled toward the 
prevailing winds. That way when it gets to be 120 degrees outside, a cooling 
100 degree 
breeze can circulate down the shaft and into the home.