Phrases with «urban walls»

Urban Walls Little Hearts Can I fill you in on a little something though? (eliseandhope.com)
They not only cover forest floors and rocks but even gritty urban walls too, if given a little help. (treehugger.com)
We've seen examples of this before, such as these bird - colony structures that can be added onto under - utilized urban walls. (treehugger.com)
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