In one corner is a giant sheet cake, designed by Cake Boss Buddy Valastro, a rainbow leaping from an open book into an edible iPad.

ENGADGET: Re-Reading Rainbow: an interview with LeVar Burton

The mountain is a giant, putrid layer-cake, with dozens of strata of rubbish separated by soil and plastic liners designed to contain the brew of noxious chemicals that would otherwise leach into groundwater.

ECONOMIST: A history of waste