![](http://www.alamy.com/thumbs/6/BB5204E4-55B7-4FAB-8E2F-4F4F409AD405/2C1MW5D.jpg)
Traffic sign in Hamburg, Germany, prohibiting older diesel trucks to enter
Size: 3353px × 5047px
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Photo credit: © Hieronymus-Ukkel / Alamy / Afripics
License: Royalty Free
Model Released: No
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