While climate policy typically focuses on future decarbonization 10 to 20 years out, temperatures continue to rise. Greenhouse gases emitted upfront from the materials fabrication, construction, and renovation of our physical environment—embodied emissions—accelerate the rate of global warming now. They increase atmospheric carbon before our buildings and infrastructure are even used. While these emissions are often ignored or deemed too perplexing to resolve, this Article, excerpted from Thwart Climate Change Now: Reducing Embodied Carbon Brick by Brick (ELI Press 2021), addresses the need to reduce them immediately.