Tencel, the answer to all the Textiles industries' environmental problems?

I often use this video in KS4 and 5 lessons to show the benefits of the closed loop system fibres like Tencel (the brand name for Lyocell)

http://www.youtube.com/watch?v=W_oq6I_7Khg&feature=related

This one is good too, perhaps more for KS4?

http://www.youtube.com/watch?v=X5_Z_8iqUAw&NR=1

Although it does go some way to covering some of the nanotechnology stuff on the spec.

I always expect students to write about new fibre developments when answering questions about textiles and the environment, they need to know that a token bit of organic cotton isnt enough to make a real change, there needs to be a viable mass-market alternative.