[lipnitsk]

I don't think this is true anymore. According to this article, Dubai now has a sewage system covering the entire city: http://p4papyrus.blogspot.ca/2011/02/sewage-system-now-cover...

[benzofuran]

As a former resident and that I still go through quite often, some limited high-end parts of the city have central sewage but the broad majority of sewage is still trucked from individual buildings to the treatment plants.