Temperatures above 50C used to be a rarity confined to two or three global hotspots, but the World Meteorological Organization noted that at least 10 countries have reported this level of searing heat in the past year: the US, Mexico, Morocco, Algeria, Saudi Arabia, Kuwait, Iran, Pakistan, India and China.
In Iran, the heat index – a measure that also includes humidity – has come perilously close to 60C, far above the level considered safe for humans.
Heatwaves are now commonplace elsewhere, killing the most vulnerable, worsening inequality and threatening the wellbeing of future generations. Unicef calculates a quarter of the world’s children are already exposed to frequent heatwaves, and this will rise to almost 100% by mid-century.
Aluminum oxidizes and no longer reflects after long term exposure to moisture. It would have to be painted white, which is really no different than current metal roofing.
Which does bring up a good point though… all we need is some really environmentally friendly and long lasting white paint (that doesn’t get dirty) and we could easily slow down climate change. Unfortunately white paint gets dirty real quick and the dirt absorbs radiation the same as a dark paint.
Anodized aluminum absorbs some heat, but that’s only one single light pass. Or well two passes. But that’s way better than aluminum with white bird poop on it which is easily cleaned. Clear anodized aluminum or white reflective aluminum would be quite superior to anything out there.