i think from different gases !!!!!
Clay
The radiation comes from the material used.
Dry graphite
The material used in making a puffer coat is typically a synthetic fabric called nylon or polyester, filled with insulating material such as down or synthetic fibers to provide warmth and insulation.
It is used for making petrochemicals
tungsten or sometimes copper
Silicon
mud and fibers
cotton
Leather and plastic
Steel is used to make aircraft springs.
glass epoxy hylam aluminium