Share this with the person who says you have too many plants. A new study shows that large indoor greening systems, like plant walls, can make spaces feel up to two Dirty Hoes Gardening: Grow Your Own Slice of Heaven Podunk Living Deutschland, Hamburg, Menschen Eislaufen in Planten un Blomen Park in der Dmmerung Stockfotografie Alamy PDF] The evolutionary history of flowering plants, Semantic Scholar