Wow. Global warming sounds like a "done" deal. The Earth will be cooked to a "well-done" stage, rather than a "medium-done" one. [/sarcasm]
It's going to be an expensive problem and adapting to it would probably be cheaper, in the long run, than attempting to stop it and (most likely) having to adapt to it anyway.
Governments should spend their money on positive steps, at the point when they really know what effects the warming will have.(If it has any.)
I have ZERO sympathy for the French. If they choose to roast their population in city apartments without air conditioning, when they have Nuclear power stations and ample power without burning fossil fuels, then they reap what they sow!