Clearly no-one alive today will see it.
However, if we progress in that direction, we'll have lots more to worry about than Greenland.
There are significant and real feed backs as greenhouse gases increase. We've been told that 350 ppm CO2 was a high safe level, we are now seeing 400ppm and rising. It could in fact be unstoppable already, and although our life times are a blink in Earths history, future generations will undoubtedly live on a very different planet.
We don't know enough about the feedback to know.
I doubt that anyone actually knows.
If we aren't careful, we will find out.
In terms of decades (centuries), or ppm CO2, or degrees C in mean decadal global temperature?
