88035
It is most severe in highly industrialized , densely populated areas of North America , Europe , and Japan and in major cities in the Middle East and North Africa like Tehran and Cairo , but even relatively small amounts of light can be noticed and create problems .
 North America, Europe, Japan, Middle East, North Africa, Tehran, Cairo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 North America, Europe, Japan, Middle East, North Africa, Tehran, Cairo