OpenStreetMap
Shouldn't man_made=wastewater_plant render now? There was a trac ticket and subsequent changeset, so surely it should render now?
Only it isn't rendering the big Esholt plant, and I'm not sure if something is broken. There are both areas and nodes tagged as wastewater_plant here, so something should appear. It looks wrong having it all missing.
Discussion
Comment from ianlopez1115 on 1 July 2009 at 11:17
for the wastewater plants to render, you may want to add landuse=industrial (until they find a way to render a wastewater plant without placing an industrial tag).
Comment from kaerast on 1 July 2009 at 11:30
OK, landuse=industrial has been added, let's give it some time to render and then see what difference that makes.