This smells like some really bold and really ridiculous PR attempt. "Ikea uses about one percent—yes, one percent—of the world's entire commercial wood supply. That amounts to about 17.8 million cubic yards of lumber last year. " [1] I guess they need this PR purchase to appease some eko organization. And this is equally ridiculous. Ikea is making furniture, something people really need. Why they have to explain them…
It's because they're fighting the arguably true reality that the majority of their furniture is designed to be disposable, and consumers are generally fine with that. I'd like to be wrong, though until we require companies to be responsible for all costs associated with the full lifecycle of a product so externalized costs are incorporated, we're not going to develop the most sustainable practices.
Some local pollution, but you ultimately are sequestering the carbon, so all is well.