Thanks for this video! A coffee break very well spent! thumbs up, particularly on the non-chemical sourcing we need more educators with this message. Adding this to my favorite videos, your logic is excellent and I enjoyed the applied math :)

I'm always looking for good presentations. This was one well done presentation. You've made my list of youtube watches.

A very good presentation, enjoyed it very much

Great editing on the volume during Q+A. Thank you for the info.

Thanks for sharing !!!!.......very interesting.

The video is awsome. Got lots of informations. Thank you very much.

Always a good view, thank you

great video! sound is very good!

Thanks for the info. Great video

very informative and professional thank you