This is a presentation I gave on behalf of the Overton Biodiversity Society to coincide with the Copenhagen Climate Summit. It is freely available here as the slides and as slides with speaker notes.
If you would like the OpenDocument originals please contact me directly and I can email them to you. I do not use PowerPoint and the slides are not available in that format, just install OpenOffice, Sun StarOffice, Lotus Symphony, KOffice or the Sun ODF Plugin for MS Office if you want to edit the slides.