I lived in an area with ideal weather, winter and summer for most my life and coal was not used anywhere. I only have 4 amalgam fillings and even though they have held up now for 60 years I considered having them replaced with gold or ceramic because of numerous metal allergies I have, but read that the removal process releases mercury and after all these years not much is leaching from the top. Did you have your had your fillings replaced?
I appreciate the informative sites you send us to and hopefully get to the YOUTube site soon.