Ecological economics is about reducing economic throughput to stay within ecological boundaries. In our dominant mainstream thinking, what we produce, how and at what price is determined by market forces. In theory markets also influence our access to goods and services when determining our salary incomes through the labour market. Innovations are made available through the financial markets. Everything can be determined by supply and demand while none of these models take into account ecological impacts or social justice. When in ecological economics we introduce the concept of a finite planet, these models no longer work. What could replace them? Today’s guest is Louison Cahen-Fourot, and we will talk about ecological macroeconomics.