Microplastics mostly come from fabric like nylon. Small fibers that can be easily broken off.
Your crushed 4L milk jug in a landfill isn't much of a source of microplastics, nor is it much of a threat to the water table (I mean, we use that same plastic for food).
Your crushed 4L milk jug in a landfill isn't much of a source of microplastics, nor is it much of a threat to the water table (I mean, we use that same plastic for food).