asenkyr
Most of the cartons are either lined with plastic, or they are tetra packs. Both of these options (especially tetra packs) are much more difficult to recycle and worse for the environment than simple PET bottles.
But I do not think OP's comment was fair to the landlords. It is not their fault that building materials are getting ridiculously expensive, that more and more people need to live in/near the cities to get a decent job and other factors that make owning your property less and less accessible.
> being skimmed off by landlords who just lazily sit around doing nothing productive
I would argue, that doing something that is not easy and taking risks is the opposite of lazily sitting around and doing nothing productive.
If you think that it is so easy and risk-free, why not take your own mortgage and let other suckers pay it off for YOU?