James Hansen speaks about climate change: Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future. http://www.ted.com/talks/james_hansen_why_i_must_speak_out_about_climate_change?language=en
Animated history of CO2 over the last 800,000 years (by NOAA) https://www.youtube.com/watch?v=t0dXjmoA0dw
Garth Lentz photo documentary and TEDx talk on the Alberta tar sands What does environmental devastation actually look like? At TEDxVictoria, photographer Garth Lenz shares shocking photos of the Alberta Tar Sands mining project — and the beautiful (and vital) ecosystems under threat. https://www.ted.com/talks/garth_lenz_images_of_beauty_and_devastation?language=en
