Wow, her reasons are illogical. If you really believed all that save the planet stuff raising a child with those ideals would do much more for the effort than not having children. This whole story seems made up in my opinion.
Ditto redphone, this is in the box thinking, in the real world there are myriads of options not to mention God, as a Christian I get rather dismayed with all these stupid scenarios that leave out a higher power.