How long does it take for rubber to degrade?
Rubber takes 50 to 80 years to degrade.
plastic do not degrade. If we bury plastic for years it will remain underground damaging under ground life. Actually, synthetic plastics DO degrade, they just do so very slowly. They do not "damage underground life", they simply take up valuable space in landfill sites because they take so long to degrade.
Yes, because when you take it from the Barrow's coffin which has been in its coffin for so long it starts to degrade because of the oxygen. If it's been exposed to more oxygen outside it will degrade at a certain moment. So in my suggestion, you need to at least use it a few times then sell it at the Grand Exchange before it starts to degrade.
Computers and electronic devices contain a lot of different materials. Some take a long time to degrade naturally (such as metals), others take a very long time to degrade (such as plastics). Most problematic, however, are rare earth metals and heavy metals such as lithium, traces of mercury and similar substances, which can be poisonous when leaking into soil and ground water.