Lego is a plastics company; they're trying to become net-zero, but, unfortunately, being a plastics company, this is extremely hard:
https://www.ft.com/content/6cad1883-f87a-471d-9688-c1a3c5a0b...
https://www.ft.com/content/6cad1883-f87a-471d-9688-c1a3c5a0b...
Lego last essentially forever. 50 year old bricks are still in use today, I don't think I have ever seen people trashing Lego. They are actually quite valuable and very easy to sell. I think the only significant losses beside a few accidents are sets that end up, unused, in attics. But they are not really lost and may get a second life as they get rediscovered.
This may be the ultimate sustainable toy. I mean, name another toy that is still usable and didn't get obsolete after nearly 100 years. The most surprising part to me is that they are still selling. Maybe that thanks to adults, I don't know how long it will last.
As for their packaging, it is mostly cardboard, they use less plastic than almost everyone else. In fact, they are going towards no plastic packaging at all.
Lincoln Logs are just over 100 years old. An original set, if any exists, should still be usable.
I just thought that particular issue around new equipment was interesting.