Home is a HD film shot in 54 countries and produced by Luc Besson. Its English version is narrated by Glen Close. The full length film (90 mins) is being hosted free on YouTube until June 14th in honour of World Environment Day. It's worth watching. As the friend who passed it on to me said, it's a powerful reminder of environmental (and social) justice.
You can access the video through this link. There are versions in many languages.