vertical lawns

Grass goes vertical thanks to Green Living Technologies. They developed a system that allows grass, but also other plants like vegetables, to grow on a wall. A first commercial application of this very green idea is to control the placement of grass of different colors and thus create advertising space on a vertical lawn. Another side effect is that we create an entirely new habitat, and I wonder which animals will start to settle there. I'd love to see vertical snails, bunnies, and lawnmowers.