That's why a 21 year old like him was out roofing roofs and making big money because he was putting his life at risk, just like the coal miners.

Both can be used instead of petroleum based roofing materials that absorb heat, contribute to urban heat island effect and degrade under the sun, which we in turn breathe.

I mean the world where advanced building materials means cement roofing tiles that are made by hand, and where, when you work 10 hours a day, you're still only earning 60 dollars in a month.