These are also easy-to-install, long-lasting, and recyclable walls that add biodiversity to any location
The project will see 300,000 trees planted each year, with over a quarter of million planted already.
Urban forests, as small as tennis courts, are planted using a method invented by a Japanese botanist in the 1970s.
The four-story building adopts the urban form of the neighboring buildings, while a gridded "rack" system covers its entire exterior with a variety of plants.
As part of the effort to combat the declining bee population, Utrecht has transformed 316 of its bus stops into bee stops.