Everything shaves off particles in varying amounts. The question is whether those particles decay on their own, make their way into our food supplies, and how t

Everything shaves off particles in varying amounts. The question is whether those particles decay on their own, make their way into our food supplies, and how toxic are they. I don't know the quantitative answers to any of these. But I would hazard that wood decays fast; and glass and concrete particles are inert, very similar to soil and not very harmful in the amounts they make into our food supplies. Plastics on the other hand, don't decay, float in water (so easier to spread) and empirically make it into our food supplies. The fear is that they are carcinogenic and cause unwanted hormonal changes.