Mario Cano Rodriguez. 1°A ESO
WHY NOT THROW NUCLEAR WASTE INTO A VOLCANO?

An element is the basic constituent of matter. Practically speaking, there is no way to break elements into something other than the elements that they are, because they are the simplest form of matter.

Radioactive waste is toxic on an elemental level. There is, practically speaking, no amount of heating that is going to break down the radioactive elements into some that is not radioactive. Throwing them into a volcano might vaporize them and turn them into a gas, but it would not destroy them or turn them into something that would be any less radioactive.