Even the most basic municipal landfill is lined, capped, and waterproofed such that even hazardous materials that might end up there aren't "polluting the envir

Even the most basic municipal landfill is lined, capped, and waterproofed such that even hazardous materials that might end up there aren't "polluting the environment". There are reasons to sort out certain waste, usually as a precaution to chemical reactions, but not leeching, but its mistaken to assume only "toxic" waste is isolated from the environment, The reason they are called "sanitary" landfills is that they already safely contain concentrated sewage, and prevent it from infiltrating water supplies.