I was discussing this with my friends at lunch earlier today.
We came up with the idea that we are still in the middle of an 'ice age', but we have gradually become accustomed to the climate.
Over the past few decades, 'global warming', caused by gases being pumped into the atmosphere by burning oil, coal and so on, has NOT caused the climate to change, but speed it up.
Think about it, the first ice age happened long before global warming, yet the polar ice caps melted anyway and froze over most of europe and many other continents.
The ice then melted, again, and refroze at the most northern and southern parts of the earth. All without global warming
Now, the polar ice caps are melting again, and what will happen is there will be tidal waves, floods and so forth. And these will eventually cause a 'second' Ice age freezing the planet.
Now, I'm not saying that 'Global Warming' isnt to blame, but I am saying that the cause of this is NOT because of burning fuel. It is simply making the ice melt FASTER.
As before, humans will survive, animals will survive, we will just have to adapt to our surroundings, like all living creatures do.
evolution
Who knows.. we might grow gills and live underwater... that would solve any worries about drowning..
Edit: I do think that people are looking for somene to blame. This is impossible to stop, but it was also impossible to prevent. It can however be delayed..
Oh - 700th post

Had to make it a big one
