Will cheaper paper mean that National Geographic magazines will crumble?

A relatively recent switch by National Geographic magazine to print its inside pages on much less costly coated groundwood paper may mean that, in future, copies will not stand up so well to the test of time. According to a story in the blog Dead Tree Edition, the magazine was previously printed on coated freesheet paper which doesn't contain lignin, a natural ingredient that causes the yellowing and degradation of the paper.