Animals, at least, make do with urine when marking out their territory.
Pungent, perhaps, but the effect is transitory and soon water and earth become one and life goes on much as before.
If only the same could be said of Mankind’s version of the We Wuz ‘Ere experiment. Alas, they’re wrinkling their noses for altogether more long-term reasons up on California’s San Gabriel River, thanks to graffiti-inscribers who’ve apparently run out of wall space.
Natural and social historians may appreciate the symmetry of this. As bears and foxes are driven by hunger towards towns, urban maggots are driven into the country by boredom.