So... apparently 4° C is baked into our mid-term future -- likely within this century, even if we go carbon neutral today. And, of course, we're going full tilt carbon loading. At projected 4 ° C the human species problem is kaput. (Do the logic.) That is to say, we're done as a species. So, the question has become: what's the best way down? Does a "best way down" even exist? Oh to be young, right?