A frustrating thing is that it’s cheaper (per letter) to send bulk mail with eg franking or giving letters to the post service pre-sorted. On the environmental

A frustrating thing is that it’s cheaper (per letter) to send bulk mail with eg franking or giving letters to the post service pre-sorted. On the environmental side, if your paper is made from reasonably sustainably sourced wood, isn’t throwing it into landfill a form of carbon sequestration?