🎧 Episode 15 — Show Notes 🏠 Episode title: Homes, Buildings & Climate 🐾 Belle’s Question: How can buildings affect climate? 📌 If you remember one thing: Buildings affect climate through the materials they use, the energy that powers them, and the way they are designed — and better choices can greatly reduce their climate footprint. 🔍 What we cover: Human-made stuff now outweighs all living things on Earth. A huge share of that human-made mass is buildings and infrastructure. Buildings affect climate before anyone moves in, because materials such as concrete, steel, glass and bricks take energy to make. They also affect climate while we use them, depending on heating, cooling, hot water, lighting and appliances — and especially on whether that energy comes from fossil fuels or clean electricity. We also look at urban heat islands, shade, trees, green roofs, solar roofs, heat pumps, low-carbon materials and smarter design. 🌟 One Bright Thing: This week’s bright thing is climate-smart buildings. In Norway, The Plus in Magnor was designed to use much less energy than a conventional factory and to generate renewable electricity from solar panels on and around the building. Its designers also used wood, natural light, heat recovery, rainwater thinking and landscape design so the whole building works more like a system. It shows that future buildings can be designed to need less energy, use better materials, create some of their own clean power and work with nature. 🔢 Key numbers mentioned: All the animals on Earth together weigh about 4 billion tonnes, using a wet-weight estimate derived from the global biomass census. Human-made buildings and infrastructure weigh about 1.1 trillion tonnes. Buildings and construction account for about 32% of global energy demand and 34% of global CO₂ emissions. The Plus is reported by Vestre to use 60% less energy than equivalent conventional factories and to reduce greenhouse gas emissions by 55% compared with similar buildings. It has nearly 900 solar panels generating about 250,000 kWh of renewable electricity per year. 👩🏫 Teacher Notes: This episode introduces the idea that buildings are not simply “good” or “bad” for climate. Their climate footprint depends on choices: design, materials and energy source. Useful keywords: embodied carbon, insulation, renewable electricity, heat pump, urban heat island, concrete, steel, timber, solar roof, green roof. Discussion prompts: Why does a building have a carbon footprint before anyone moves in? Why does the source of energy matter as much as the amount of energy used? How could a school building be made cooler, cleaner or more efficient? 📚 Sources & further reading Nature — Global human-made mass exceeds all living biomass. https://www.nature.com/articles/s41586-020-3010-5 PNAS — The biomass distribution on Earth. https://www.pnas.org/doi/10.1073/pnas.1711842115 UNEP / GlobalABC — Global Status Report for Buildings and Construction 2024/25. https://www.unep.org/resources/report/global-status-report-buildings-and-construction-20242025 IEA — Cement https://www.iea.org/energy-system/industry/cement US EPA — Benefits of Trees and Vegetation for Urban Heat Islands https://www.epa.gov/heatislands/benefits-trees-and-vegetation Vestre — The Plus: what we aim to achieve https://www.theplus.no/en/the-plus/what-we-aim-to-achieve Vestre — The Plus recognised with the highest environmental classification https://vestre.com/news/the-plus-recognised-with-the-highest-environmental-classification Bjarke Ingels Group — The Plus https://big.dk/projects/the-plus-3837
