This old article describes how horticulture can not fix everything.
Foliar tapestries are impressive in the right situation. https://tonytomeo.wordpress.com/2018/02/25/foliar-tapestries/ They work as nicely on exterior walls as conventional tapestries or paintings might work on interior walls. However, they require much more maintenance!
Trendy green walls are overrated. Their only real advantage is that they are pretty. They are not a ‘real’ solution to anything. They may keep the interior of a small building a bit cooler, but no more than light colored paint or a shade structure would. They do not save water, and actually use more water than plants grown in the ground. All that water is likely to rot the walls behind, or the decking below. They do nothing for melting glaciers or saving the planet. In a few more years, when they are no longer trendy, they will be more junk in the landfills.
Most obtrusive exterior walls can be obscured or partly obscured with less demanding…
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