TV show "Expedition Alaska"....

I watched that vid and when I did....... it made me depressed all of a sudden. Two scientists took pictures for present time today and compared them from 100 years ago. The difference was that a total of 1 trillion ice melted and sunk into the sea. There were also ice caps in teh north melting and polar bears have to take refuge in Alaska. There were also cross-breeds between Grizzly and Polar bears these days and discovered a Polar Grizzly. This was found out in teh news about that Polar and Grizzlys are getting too close to each other. I also saw another part when methane is starting to be released and it can store the sun's heat and heat teh earth to melt the ice caps and glaciers. These animals are about to be extinct and will dissappear if the glaciers disappear. If teh ice caps disappear, then polar bears disappear. What do you think about this?