In the face of growing concerns regarding human-induced climate change, we are beginning to understand the intricate link between preservation and sustainability more than ever. Traditionally, "Historic Preservation" has been synonymous with safeguarding "Significant" landmarks and structures, as defined by the National Historic Preservation Act of 1966. The understanding was that these "Significant" edifices deserved preservation, while others could be demolished or modernized as per contemporary requirements. This belief fueled urban renewal initiatives in the post-World War II era and has heavily influenced development and construction practices in the United States.

We now know that in advanced industrial economies, nearly half of the environmental impact of human activity is tied to buildings, with construction and demolition cycles accounting for a significant portion of this. It is, therefore, crucial for planners, policy-makers, and preservation advocates alike to pay more attention to managing our built environment. We must strive to preserve more of the "Embodied carbon" represented by existing structures in the United States and beyond to mitigate environmental impacts.

As such, the American Institute of Historic Preservation is deeply invested in efforts to recalibrate preservation policies to incorporate environmental considerations. Decisions about preserving and demolishing existing structures should be made with an eye towards maintaining a larger proportion of standing buildings, thus reducing climate impacts.