Main source of Earth's Heat

Malika.Munjal

Par 100 posts (V.I.P)
While listening about global warming everytime, ever wondered where does the main source of Earth's heat comes from? Radioactive decay of Uranium Thorium and potassium in earth's crust and mantle is the principle source of Earth's heat - some 44 trillion watts that continually flows from Earth's interior to space!
 
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