MOMS WATCH THIS BEFORE YOU LET YOUR CHILDREN SEE IT!!!
You may think it will be okay because of the Disney label and the G-rating but in reality there are some harsh scenes in this film.
This documentary is a way to let people learn how life on earth really is. What the animals have to go through just for food. Its blunt and honest but at times a little graphic representation of life on earth. This film mainly focuses on polar bears, humpback whales, and elephant families as they live and try to survive in the world. Not only does this film focus on the animal families but also the environment and climates of the world. It shows tremendously beautiful places most people would never see for themselves.
The stories being told in this film capture the heart of many but they also leave you feeling sad.. While watching this film I had many different emotions running through my body. I was happy most of the time, shocked, sad, and overwhelmed. At times I was a bit bored with the film but it always kept my attention. If you love animals you may want to watch this movie or you may not. There are scenes of predators killing there prey, a night attack by lions on a elephant, a polar bear attack that failed. These are very saddening and you may want to turn your head away for a bit. You will want to see it if you are interested in the beautiful world we live in. I learned many knowledgeable facts by watching this film. 
P.S. This film is best viewed in Blu-Ray.
Thanks for the warning Ky!
That polar bear looks like Cinderella