I was asked the above question recently, whether the fall or curse of creation (the ground in Gen 3:17) was a necessary consequence of the sin of Adam, that is, it did not have to happen. In other words, God could have chosen for Adam, Eve and their decedents to be under the power of original sin, but creation would have remained in its pristine form. Then there is Gen 8:21 after the flood where God says that never again will he curse the ground because of Man, making it seem like a choice that God could make and not a necessary consequence of an evil action on the part of man.
This is pertinent because I know of a Catholic (from whom I have learned so much from) who maintains that God could have chosen for Mary to not have been immaculately conceived but He did so because if was more fitting. I argued the opposite that is was necessary for Mary to be born immaculately conceived if she were to be the mother of God, and I believe this is more in line with the teaching of the Church.
So was it necessary for creation to be cursed as a result of original sin, or was it unnecessary but fitting?