The need for seaw walls is intensifying due to climate change. But seaw walls themselves, at least the old kinds, are not very friendly to the environment. They leech chemicals.Now, one startup is not only building non-toxic living seaw walls, but they're actually 3D printing them. These seaw walls from Miami based kinds are made to mimic mangroves and other marine habitats. That's why the ripples in the concrete.So, not only do they protect coastal communities from rising tides, they also create marine hab ...