Most garbage is not radioactive. Garbage is decomposed biologically by bacteria, fungi, earthworms, maggots, etc. However some garbage (e.g. plastics, glass) do not decompose and simply take up space in the dump or landfill, unless recycled in some way.
That would be radioactive decay.
It is a nuclear process.
The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.
radioactive decay
alpha particles
Carbon dating
paper leaf cotton glass
The radioactive decay of americium 241 is by alpha disintegration; the disintegration of radioactive krypton isotopes is by beta particles emission.
If it is related to Nuclear studies, then the answer would be fusion.
Decay energy is the energy that has been freed during radioactive decay. When radioactive decay is ongoing it drops off some energy by means of discharging radiation.
One reason is that radioactive decay heats the earths interior
That statement is not entirely accurate. Radioactive decay can involve the emission of alpha particles, beta particles (electrons or positrons), and gamma rays. Electrons can be involved in certain types of radioactive decay processes.