This is a nice video worksheet to learn the topic of the protection of the ozone layer. The cartoon explains perfectly well the notions of UV rays, the ozone layer, CFCs.
This can be a perfect activity to introduce the topic of environmental protection.
First you can study the vocabulary from the cartoon and do a before-watching test to pre-teach the topic (the answers to the test are given), then watch the video and do post watching exercises.
In the worksheet you can also find a link to a very interesting website devoted to this topic. (questions to the test were taken from this site)
Hope you`ll like it :)