David Suzuki says something I believe: it's too late to save the civilization we're used to, but not too late to save some of your neighbors for a while. Some quotes:
"Q: You’ve been quoted many times over the last couple decades saying it’s not too late to tackle climate change, so when did you come to this realization that the battle is lost?
A: It’s been coming all along.
We had previously said that the choice with climate change was mitigation and adaptation, and people began saying 20 years ago that we had to talk about adaptation. Other people said we can’t talk about adaptation because that acknowledges that climate change is real and impacting people. Well, we’re way past the time when we should have been thinking about adaptation.
[....]
For me, what we’ve got to do now is hunker down. The units of survival are going to be local communities, so I’m urging local communities to get together. Finland is offering a great example because the Finnish government has sent a letter to all of their citizens warning of future emergencies, whether they’re earthquakes, floods, droughts, or storms. They’re going to come and they’re going to be more urgent and prolonged.
Governments will not be able to respond on the scale or speed that is needed for these emergencies, so Finland is telling their citizens that they’re going to be at the front line of whatever hits and better be sure you’re ready to meet it. Find out who on your block can’t walk because you’re going to have to deal with that. Who has wheelchairs? Who has fire extinguishers? Where is the available water? Do you have batteries or generators?"
Read the whole thing, it explains more.