The European Union intends to be climate neutral by 2050. This will require decarbonization at all levels of the economy, and the construction sector will have a particularly key role to play. The sector accounts for around 40% of CO2 emissions globally, and steel and concrete, in particular, require enormous amounts of energy to produce. There needs to be a paradigm shift to replace these building materials and their associated environmental impact. Natural and renewable building materials play a crucial role in this.