Urbanites "fumed out of the city" who climb up any of the surrounding hills and gaze down overlook a brown sooty haze that forms a stark contrast with the blue sky above.
身在此市中，卻「霧」深不知處的台北人，可以到盆地四周任何一座山上往下瞧，盆地裡不斷往上騰升的黃褐色霧氣，與抬頭望及的藍天，是清與濁的對比。