In this context I have a question. Cardboard is often recommended as a weed suppressant, but recently I read an article about cardboard and paper. Here, in Europe, much paper and cardboard is recycled, much of it several times. This article was about all the chemicals that are used in this recycling process, many of them having hormone changing properties. And recycled cardboard contains very high levels mineral oils. So far I’ve been using it in my compost bin when I don’t have enough brown material, not sure I want to do that any longer.
Any thoughts about this, anyone?