Through their extreme heat, plasma arc torches melt metals and hazardous solid wastes into a nonhazardous, nonleachable glass-like slag that can be used in roadbeds, for example.
(plasma arc torches; melt; metals and hazardous solid wastes) (a nonhazardous, nonleachable glass-like slag; can be used; L:in roadbeds)
plasma arc torches a nonhazardous, nonleachable glass-like slag
melt can be used
metals and hazardous solid wastes
L:in roadbeds