Also readable online at http://www.ipcc.ch/publications_and_data/ar4/syr/en/main.html http://www.ipcc.ch/publications_and_data/ar4/syr/en/main.htm... I would a

Also readable online at http://www.ipcc.ch/publications_and_data/ar4/syr/en/main.html http://www.ipcc.ch/publications_and_data/ar4/syr/en/main.htm... I would assume this is where the 70% came from: "[...] As global average temperature increase exceeds about 3.5°C, model projections suggest significant extinctions (40 to 70% of species assessed) around the globe." http://www.ipcc.ch/publications_and_data/ar4/syr/en/mains3-4.html http://www.ipcc.ch/publications_and_data/ar4/syr/en/mains3-4...