What makes the embodied energy of a building a “sunk cost”? It’s the kind of cost that can only be assessed through careful analysis of the existing structure.
It’s the kind of cost that can only be assessed through careful analysis of the existing structure.

It’s a real cost that has already been paid in the past and so doesn’t represent a present expense.
It’s a real cost that has already been paid in the past and so doesn’t represent a present expense.

It’s a cost that can surface in the budget unexpectedly without attention to energy efficiency.
It’s a cost that can surface in the budget unexpectedly without attention to energy efficiency.

It’s a cost that must be built into the budget but doesn’t relate to a specific budget area.
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