For 500 years of waste storage, it needs to have an expressive power to protect itself. In half a thousand years, people may have forgotten the meaning of its existence, but it will continuously exsit. And the radioactive elements that people create today that take a long time to eliminate are also representative information of this era.
Since humans use the products of past creatures as compost and live on it, why can’t future humans and other creatures use the products of present humans as compost? Plastic is organic, nuclear waste is energy, and carbon dioxide contains carbon.
Radiosynthesis is a theoretically feasible production method. By capturing the energy emitted by ionizing radiation, a metabolism similar to photosynthesis is performed.
Obviously, in a dome that needs to be closed for 500 years, lighting will be one of the most difficult resources to obtain. Only plants such as Orobanche and mycoheterotrophic plants that feed on fungi or other plants can survive without light. Similarly, fungi rely on other sources of energy rather than photosynthesis to survive. Therefore, the relationship between fungal growth and light is not strong.
On the other hand, as a metaphor for nuclear weapons, the mushroom cloud is widely used, like witness of Nagasaki Bomb said “a giant mushroom”. The smoke produced by a firearm resembles a decomposer of an ecosystem, forming an interesting contrast.