Mark has a video on youtube about what pollutes more ... electric vehicles or gas? He wants to make it available for anyone to distribute, re-edit, etc. Is that open source? Leo says no. It's actually "Creative Commons." That's the phrase he's looking for. Legally, copyright exists once one publishes their work. But what people can do with it can be anywhere from Public Domain to Strictly copyrighted. And Creative Commons can help Mark create the proper creative commons copyright for people to do what they want with it.
Here's the video -