Freeze it, transport it in double-hulled ships, and pile it up in Antarctica as a resource for when the Earth's magnetic field flips. Said zero-field interregnum will deflate the magnetosphere, allowing solar wind to strip the upper atmosphere of light molecules like H2O. Frozen water storage is our only hope to counter evaporative dissipation of the oceans - unless you want Chicoms invading California on foot.
You may not put all that ice at the equator. Conservation of angular momentum would slow the Earth's rotation, making the days longer and forever postponing Baby Boomer retirement. Wait... two birds, one snowball.
OTOH, we could shoot all the Greek sponge fishermen and let Nature restore its balance. No, that would be cruel. We'll shoot half the men and half the women so that on the average they cannot reproduce. That's diversity in action!
