(1) Thomas, Owen, “Proactive Sustainability,” Urban Land Magazine, Sept. 18, 2023.
https://urbanland.uli.org/public/proactive-sustainability/

(2) CBRE, “Decarbonizing Commercial Real Estate: A guide to making your carbon-reduction strategy
a reality”, quote from section “Phase 2: Continuously improve energy efficiency”.
https://www.cbre.com/insights/reports/decarbonizing-commercial-real-estate

(3) ASHRAE, “WHAT IS BUILDING DECARBONIZATION? ASHRAE Task Force for Building
Decarbonization,” https://www.ashrae.org/about/tfbd-what-is-building-decarbonization

(4) Grainger, Guy, “To create net-zero cities, we need to look hard at our older buildings; Retrofitting
existing real estate is critical to cutting carbon emissions.” JLL, November 7, 2022.
https://www.us.jll.com/en/views/to-create-net-zero-cities