Decay heat accidents are where the heat generated by the radioactive decay causes harm. They are normal agents of decay and decomposition. Fluoride exerts its major effect by interfering with the demineralization mechanism of tooth decay. Elements such as lead formed largely through the radioactive decay of heavier elements. Methadone has been implicated in contributing to significant tooth decay. This behaviour is similar to radioactive decay. He observes that any material is subject to irreversible decay. Astatine-217 is produced via the radioactive decay of neptunium-237. Peat forms when plant material does not fully decay in acidic and anaerobic conditions. Sunspots eventually decay, releasing magnetic flux in the photosphere. Diamonds are dated by analyzing inclusions using the decay of radioactive isotopes. This is an instance of exponential decay. The views on the most effective method for community prevention of tooth decay are mixed. The views on the most efficient method for community prevention of tooth decay are mixed. Classically, these orbits must decay to smaller circles when photons are emitted.