The market for carbon capture focuses on large-scale projects -- capture retrofits in heavy industry, say, or enormous facilities to suck carbon directly out of the air. But should we also be capturing carbon inside buildings? Our guest for this week says yes. Nick Martin is COO of Carbon Reform, a Delaware-based startup developing a modular retrofit device for commercial HVAC systems that scrubs both traditional indoor air pollutants and carbon dioxide. They raised $3mn in seed funding in fall 2022. We discuss with him how their module can save customers money on energy costs, how they're thinking about target markets, and why traditional carbon-capture policy incentives need tweaking to serve decentralized solutions like theirs.