Incorrect relative humidity
Too high, too low, too large fluctations
Incorrect temperature:
Too high, too low, too large fluctations
Fire
Electrical sources, gas leaks, flammable liquids, smoking, arson
Criminals and vandals
Break and enter, theft, souvenir hunting, graffiti
Pests
Insects, rodents, rats, cats
Contaminants
Dust, dirt, air pollutants, faulty restorations
Radiation
UV, VIS, IR
Water
Leakage, burstpipe, spillage, cleaning
Physical forces
Earthquake, vibriation wear and tear, break, scratch
Dissociation and curatorial neglect
Misplacing objects, no inventory, removing labels