Cardboard, specifically corrugated, is my new pet peeve. Our household receives roughly 30 items from amazon.com every week, all individually packaged in separate corrugated cardboard boxes. I try to do well, accumulating several items in my cart for a day or three before eventually needing something ASAP and going to the checkout page, thinking all or most of them might show up in a single box. But they inevitably show up in a dozen separate boxes, all on the same day or two. I know why, they might be coming from separate warehouses, but it still feels frustrating and wasteful.
We put a 96 gallon roll-about recycling can every week, completely packed with corrugated, a few plastic milk jugs, and maybe a half dozen glass bottles. Easily 95% - 98% of our recycling mass or volume is corrugated, and 90% of that is from amazon.com. It could be easily reduced to 1/3 of its current volume, if amazon better managed their logistics for environmental consideration.