For things that have had contents with volatile oil like thinners they should be left for a few days to completely evaporate it before being disposed of as non-flammable waste
In regard to the internship system in the United States I availed myself of part of Miyumi Tanaka's work "Making doctors in Harvard" (Igaku-Shoin Ltd.) as a reference
In order to live happily and healthily with parakeets or parrots, you should understand the science of animal behavior for domesticated birds, and consider the emotional effect of eventually losing them