Our group decided to completely change our project and think of another practical application for our criteria of optimally packed spheres. Last week we thought of an application for which our design could be used after had already created our spheres. This time, we came up with an existing problem we wanted to solve. The two main problems with already existing green/living walls are:
1) The soil can easily fall out and onto the ground when it dries, because it is packed into the wall and the plants are growing horizontally, not vertically.
2) Most green walls can only have one or two plants that have the same nutritional requirements and can be uniformly watered
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