RE: Coal Dust = HAZ MAT: U.S. EPAThat would be very nice and very good for the environment.
The market out there isn’t exactly full of once in a life time investment although Sparton is definitely one of them.
Here’s another company with pretty unique technology to recover waste heat and capture waste natural gas:
https://www.opconab.com/index.asp?cID=10&langID=2&sPage=1
Presentation to NA investors from their Australian partner:
https://www.asx.com.au/asxpdf/20090929/pdf/31kznsbg1q6b9v.pdf