A new biome you say? I would much prefer a previous one, that which was part of the "mammoth steppe", which had thrived for well over some one-hundred thousand years and ended only relatively recently some ten-thousand years ago. It should be obvious why I welcome a reintroduction of this period, essentially reverting back to the Pleistocene epoch and its pronounced glaciation. More or less the objective would be a "reset" of sorts, predominantly to reintroduce the megafauna of the past and have somewhere to preserve them in an appropriate habitat. Not that the change of the environment was a mistake, the Earth has had countless cold and warm periods, with many, many more subsections within them, but primarily to return to how things were prior to man's ascension.

That said, what is your preferred drink? Tea? Coffee? Soft or hard liquor? Other?