Is halting climate change beyond man's ability? Surely all I need to do is add one other factor, which I was hinting at when I asked the question about where do the people who live in cities, which will find themselves below sea level, go, and what will they eat? ( perhaps you can answer this question now). The other factor is human conflict.
As to what we're going to do about it, well we can hope that world leaders will get together soon and start to formulate some plans. It's not looking very promising at the moment, but once there is money to be made in the green economy things might improve. More worrying though is the lack of foresight in regards to sea level rise. There are still many sea level developments continuing, along with building in flood plains. I wonder when real estate values will start falling on low lying property.
As I explained earlier, primates evolved at a time when the earth was so warm there were no polar ice caps. It's not going to get warmer than that. What did you think was going to happen? The oceans would just boil away and the earth would turn into a small star or something?
Have you considered how easily a civilisation can fall into a free for all between warlords? There is plenty of evidence in the historical record. Any high tech development, or industry will be straight out of the window. We will be straight back to a medieval lifestyle if we're lucky. Large areas will probably descend into waring states like Syria, or Somalia, or worse.
So we can probably agree that large numbers of people will die, there will be great suffering and injustice. Experiences which don't lend well for mutual cooperation. There is in fact as I'm sure you are aware, great suffering already, around the world and climate change has barely begun to affect the environment so far.
So we are going back to a primitive existence in short order, unless drastic action is taken soon to reduce global warming and it may be to late already. Agreed?