Periodical |
| Sequential | Sudden | ||||||||||
Daily | Seasonally | Worn out | Changing urban characteristics | Accumulation of dust | Accumulation of waste | Natural phenomena (as thermal greenhouse effect) | Emergence of emissions | Emergence of electromagnetic fields | Sudden removal of a nearby building | Earthquakes | Floods | Wars | Permanent change in use |
A | B | C | D | E | F | G | H | I | J | K | L | M | N |