The near-universal use of H2 blue, green or red framing timber in construction is now a time bomb for landfill in 20-40 years’ time. It cannot be composted nor recycled, and thus is sent to landfill. In an ideal world, buildings would be carefully deconstructed and every skerrick reused, but in the Land of Oz, where labourers are paid $55 per hour, and landfill rates are less than $200 per tonne that is just a pipe dream.