This video is part of a teaching material about climate change for the younger children. The film is rather long, and the reason for this is to give the teacher a chance to explain the content to the pupils, and to discuss with them what is happening throughout the film.
What's with the sun rays? What happened to the trees? What are those black bags? (Waste!) What is happening with the temperature? Where are the birds? And so on.
Let the children discover what is going on, then help them understand the full meaning of it all.