And that's 100% truth. Future generations will look back & lament how this wasn't out #1 priority. They'll talk about how the warning signs were all around us, and we just ignored them: mass extinction, loss of habitat, droughts, storms, polar melt. They'll ask how we could have possibly thought any of this was sustainable. They'll think we were shortsighted, and stupid.
Most of all, they'll wonder how in the world it all became so political, so fast. How it could have possibly been a right/left thing, when all of us have a stake in the outcome.
Our future won't be pleasant. It may (or may not) be survivable - but it's all very predictable right now. And all of the other issues that we debate here, day in & day out? Pretty meaningless if we don't take care of our home.