Well, I had figured geothermal vents etc would be kosher; kmmontandon, mentioned in the original discussion thread that he has access to lots of volcano and geothermal vent type pictures. But perhaps we should ask Uranus if he had wanted to include natural vents….what say you, Uranus?
Wooo…really late to see the question,Elsinore, but I think natural vents are great! Anyone want to dive to a bazillion feet to get those deep Atlantic ones?
Barring the scatalogical, I’d say anything goes. Keeps life interesting.
Are you talking like sewer/stormwater drain type grates? Cause those don’t seem very “vent-y” to me…they steam in the winter only as a consequence of carrying warmer water than the surrounding air, not to specifically give vent to anything. But maybe that’s not the type of grate you mean?
Wau!!! This was fun ! Add another something to my learning curve. I was think that the examples must show some of the form of venting, and not just what can vent. Why I did not ask this question, I don’t know. 😯
I don’t care on votes, I just must be clear on the theme. How I could not see this ?
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