[tomp]

But box is just paper, which literally grows on trees.

[maccard]

And water, and energy. A lot of both.

[tomp]

Energy is free. Sun's light is either hitting plants (that use it to grow) or it's hitting the ground.

Is water a big problem, in e.g. Europe? No idea honestly... it's obviously 100% recyclable, but it might be in the wrong place at the wrong time...

[rtkwe]

It does consume nutrients from the soil which would need to be replenished eventually on tree farm plots.