Nice illustration but could do with some caveats and assumptions.
With regards the biomass image - it would be nice to see; deserts, arctic tundra, agriculture to support current population, current human habitation etc etc (even graphically in strip form to underline if there's enough room!)
Nick/ Tom.Thanks for your comments. Will add assumptions shortly. On biomass, i will also upload some data on global land areas for agricultural and arable land.
Your graphics are so much more elegant than my 'this is clearly bollocks' in 28pt bold summary! Good to get the arguments in one place, thanks for doing this.
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