The magnitude of the change is far beyond anything that has been experienced over "recent history" where "recent" is on a geological time scale. It's not on the

The magnitude of the change is far beyond anything that has been experienced over "recent history" where "recent" is on a geological time scale. It's not on the order of the "little ice ages" and such of the past. It is extreme. Change, apropos of nothing, is not positive or negative; but when the climate changes so much that the ocean turns into acid and the animals start to die off, people will have concerns.