The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.
Disposal of human waste through birds dropping the seeds of excreting them through the dropping of seeds from the plants which sometimes are carried by the wind
