Well-designed landfills are probably better than loading plastic into confetti cannons, but calling anything in a man-engineered landfill "undisturbed in the ea

Well-designed landfills are probably better than loading plastic into confetti cannons, but calling anything in a man-engineered landfill "undisturbed in the earth" is a stretch. Plastics sitting in our landfills are, at human timescales, sitting relatively undisturbed on the outer skin of this world, where they are probably a teensy bit less "sequestered" than they were several thousand feet into the crust. At anything approaching geologic time, some fraction of these feats of engineering will be graciously buried by layer upon layer of new sediments; others will be sundered by the same forces that flatten mountain-ranges and carve canyons, their contents re-circulated through nature's supply chains.