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