Global Cooling?

A much bigger issue is the change in the Earth's albedo caused by deforestation. Savannah, grasslands, pasture, etc, increases the reflectivity.However, I would suggest that it is interesting to note that, if as you say the Earth is actually entering a cooling trend - whether natural or anthropogenic causes predominate - we have the problem of explaining the significant reduction in ice cover of most North and South American glaciers. Wouldn't they be expanding, rather than contracting if the Earth was cooling?

Unfortunately, due to bandwidth, I'm unable to watch/listen to that file. I question the conclusion they mentioned that you presented here, however. At the end of the LGM, fossil evidence clearly indicates that both terrestrial plants and animals were able to habitat track to stay "in their zone" as you put it. However, conditions are no longer those that pertained at that time. Most modern terrestrial habitats are heavily fragmented, primarily by human impacts. In short, there is no habitat to track to, or no way to get where their "zone" will exist. Additionally, the speed of current climate change is unprecedented, meaning there is likely no more than a very few generations available for adaptation in most organisms. Ultimately, my prediction is that even in those organisms with exceptional dispersal abilities, a significant risk of extinction - vice evolution - is the mostly likely outcome.