habitable planets

[Anomalocaris]

The way we are going this one won't be habitable too much longer.

I think we should not exaggerate.   What we are doing is changing the habitability parameters of the earth in a way that will cause great material wastage and damage to our own civilization, and cause a major change to the biosphere that had existed in the last 30-40 million years.   But even our worst excesses do not come anywhere close to actually making earth non-habitable ito humans or a biosphere that is still overall roughly like the one that had existed since the Cambrian explosion

Even the unpleasantness of the aftermath of an all out nuclear war with peak Cold War Arsenals won’t make the earth actually uninhabitable.

The environmental wastrels plays down how much even moderate disturbance to the environment can devastate the human society.   Many environmental activists exaggerate the scale of disturbance we can manage.   Both argue for effect rather than to inform.