Underground heat gives light.
Patel-Predd
Prachi
P
D000413:Alaska; D004553:Electric Conductivity; D004560:Electricity; D005742:Gasoline; D006358:Hot Temperature; D008027:Light; D011210:Power Plants; D013227:Steam / Q000032:analysis*; D013696:Temperature; D014835:Volatilization
D005742:Gasoline; D013227:Steam