Do polar bears ever become bipolar?

I don't mean do they travel to the South Pole, I mean do they get depressed over the fact that the North Pole will have disappeared in thirty years in the summers, if we don't fix climate change?

It's a serious question, since the poles are warming faster than the rest of the planet.

This book takes a sensitive, but light-hearted look at a serious issue where people can become unpredictably hyper and hypo by turns (not by terns), alternating between happy and sad, irritated for no reason, acting without consideration of consequence - In fact, just like humanity is when it comes to climate change.

Note that for medical advice you should talk to a competent qualified medical professional!