In this blog, Marc Colella, ArchTam Fellow, examines how digital innovation can help cities and portfolio owners accelerate their net-zero transition while safeguarding long-term value and livability.

What’s the urgency?

The built environment remains responsible for nearly 40 percent of global carbon emissions, making it both a major contributor to climate change and a crucial lever for mitigation. Although progress has been made — the sector’s carbon share has dropped from 39 to 37 percent in just five years, energy intensity is down 15 percent since 2010, and renewables now supply almost one-third of global electricity — the momentum remains uneven. High retrofit costs, regulatory complexity and rising investor expectations are placing pressure on portfolio owners to act decisively.

Key barriers to portfolio decarbonization

The pathway to portfolio decarbonization remains constrained by several persistent challenges, especially related to mobilizing technology. The four digital and systemic barriers that must be overcome to unlock large-scale transformation are:

1. Data fragmentation – Asset-level carbon and energy data is often trapped in silos across diverse geographies, sectors and standards.
2. Regulatory complexity – Over 40 national carbon regulations exist worldwide, each with distinct formats, verification processes and disclosure requirements that complicate cross-market alignment.
3. Scope 3 tracking – Indirect emissions, often forming the majority of a portfolio’s carbon footprint, remain largely untracked or inconsistently measured.
4. Technology infrastructure – Many organizations still rely on disconnected digital tools. Scaling a digital platform across markets with different cybersecurity and data laws is a significant undertaking.

Despite these challenges, the pace of digital evolution in the built environment offers reasons for optimism. Over the past decade, the industry has moved from static spreadsheets to predictive digital twins, and from manual compliance to AI-powered climate intelligence capable of optimizing investments in real time.

The next frontier is integration, which includes building scalable ecosystems that link data, technology and human insight. This approach allows for simulation, planning and action across entire portfolios, which then turns decarbonization from a fragmented exercise into a coordinated, data-driven strategy.

Portfolio Decarbonization Transformative Framework

To guide this transition, we’ve developed a Portfolio Decarbonization Transformative Framework, mapping five domains where digital transformation must occur simultaneously for decarbonization to reach its full potential. Each domain connects people, processes and technologies in one shared ecosystem, ensuring that every stakeholder from portfolio managers to facility operators can act on consistent, real-time insights.

The potential benefits are clear:

• 35 percent reduction in operational emissions.
• 40 percent higher return on investment (ROI) on capital works.
• 95 percent faster regulatory reporting.

The framework also underpins our pioneering work in Portfolio Carbon Capital Optimization, an approach that integrates financial and carbon intelligence to optimize investment decisions across complex asset portfolios.

Turning strategy into action: The role of digital twins

The Portfolio Carbon Capital Optimization Framework is a digital planning twin designed to optimize both carbon reduction and cost performance across entire asset portfolios. It unites a suite of analytical tools within a shared data ecosystem, enabling portfolio and facility managers to make coordinated, data-driven decisions. Using an optimization algorithm, it generates capital works programs that balance carbon reduction, cost efficiency, and compliance priorities.

By connecting users, tools and data across disciplines and systems through a centralized data lake, the platform delivers consistent, real-time insights across all assets, thus transforming strategy into actionable and financially defensible pathways toward net zero. Beyond portfolio management, it also serves as a model for how city-scale digital ecosystems can inform infrastructure planning, energy transitions and investment prioritization.

Advancing the decarbonization agenda

Accelerating decarbonization requires more than technology. It requires commitment, leadership and systems thinking. Resilient city-making is a collective endeavor, driven by the shared goal of achieving a net-zero, inclusive urban future.

So, what are some of the next steps the industry can take?

• Approach decarbonization as a portfolio-wide challenge, not an individual asset issue.
• Establish a digital framework that unifies data, personas and outcomes.
• Align capital programs with carbon optimization, prioritizing the execution of projects with the lowest returns to maximize overall impact.
• Adopt an open ecosystem approach — recognizing that no single technology or organization can deliver the full solution alone.

Our work alongside clients, governments and industry partners helps to turn climate goals into actionable pathways — helping shape cities that are not only decarbonized, but also equitable, connected and ready for the future.

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The aviation sector stands at the forefront of one of the biggest challenges — how to grow and evolve while reducing its environmental impact. For airport operators, that means grappling with growing passenger demands, aging infrastructure, and an increasingly complex web of energy, carbon and resiliency targets.

Our team has been partnering with the Maryland Aviation Administration (MAA) to create a comprehensive decarbonization roadmap for two of its airports: Baltimore/Washington International (BWI) Thurgood Marshall Airport and Martin State Airport. This roadmap supports both MAA’s priorities: to achieve compliance with state and federal climate legislation while preparing their infrastructure for future passenger and airline growth.

Our challenge was to help MAA to meet ambitious climate targets, including Maryland’s Climate Solutions Now Act goals of a 60 percent greenhouse gas (GHG) reduction by 2031 and net zero by 2045; while simultaneously accommodating terminal growth and enhancing system resilience.

Tools that visualize action

Our aim was to help MAA make sense of a very complex picture. To do that, we created several in-house energy and emissions modeling tools, including:

• Central energy plant analysis tool (CEPA), which allows us to rapidly simulate various plant configurations and identify cost-effective, lower-carbon solutions that align with future electrification goals.
• Microgrid modeling tools, which allow us to model the performance of on-site solar power, battery storage, diesel backup generation, and their ability to collectively maintain critical operations during grid outages. Beyond resilience, we explored how a microgrid could also reduce energy costs by selling power back to the utility when it’s economically viable.
• Digital twin technology, which shows exactly where new energy systems (solar PV arrays, battery storage, future electrified central plants) are located. This not only helps with internal communication and stakeholder buy-in but also serves as a planning tool that ties infrastructure improvements directly to capital investment decisions.

Metrics that inform decisions

Metrics are the backbone of any credible roadmap, and for MAA, we focused on three primary dimensions: 1) energy use, 2) GHG emissions, and 3) cost.

One of the most important strategies we had to deploy was the transition away from fossil fuels by electrifying legacy natural gas systems. This helped shift emissions from Scope 1 (on-site combustion) to Scope 2 (purchased electricity). At the same time, we modeled future electricity market scenarios in the PJM grid (which includes Maryland), where electricity prices are forecast to rise by as much as 30 percent. This dual focus allowed us to balance emissions reduction with cost resilience.

We also provided clarity on Scope 3 emissions, particularly those from airline operations, providing strategies for how MAA can influence reductions through collaboration with carriers, sustainable aviation fuel adoption, and more efficient airfield and gate operations.

Timelines that anchor implementation

We mapped each target to specific, timed actions and bundled them into short-, medium-, and long-term initiatives that integrated with MAA’s existing capital improvement plans. In effect, we transformed decarbonization from ambition into an embedded part of their growth strategy.

We helped MAA identify which projects they should advance now (e.g. electrifying existing systems, installing solar and storage) and which could be phased in later, ensuring each investment was justified not only environmentally, but financially and operationally.

Through a clear, actionable framework, we helped MAA move from planning to progress, with every decarbonization initiative supporting both their sustainability goals and long-term operational success.

For more information about our portfolio decarbonization and climate resilience services visit: Portfolio Decarbonization and Climate Resilience

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