You have to see it to believe it! Directors Alastair Fothergill and Mark Linfield have done a thing really great, it is a 10 out of 10 so I can not believe that other user of this web had rate it so poor, unless they were expecting to see just a normal movie, with people, love scenes, and so on. I am also convinced that this kind of documentaries are an excellent way to wake up us in order to save our beautiful planet. Finally, it has nothing to do with Al Gore's documentary-movie "An inconvenient truth" mainly made of long monologues, painfully and with "truths" not always accurate, as many scientists have pointed already.
The best thing you can do on earth is not miss Earth.