Save the World: Use Garamond

As publishers of a new nature memoir, Arctic Circle, we would be amiss not to point out this tidbit of typographic conservation: the folks at Go to Public School have discovered that Garamond uses the least amount of ink out of several popular faces. I wonder if this holds true for the rest of the Garamond revival types, such as Sabon and Granjon? Perhaps not — they all seem relatively meaty compared to Slimbach's slim sorts.