In academic writing from Green perspectives, work on the economy is perhaps the most well developed. This is understandable given that the economy constitutes the metabolism between human society and the wider ecosystem of which it is a part in terms of materials, resources, energy and waste. This chapter explores the critiques that Greens provide of the contemporary economy before considering alternative visions of a Green economy, as well as thinking about how to get from one to the other. Hence, I first outline Green critiques of today’s global economy, in particular its ecological unsustainability and commitment to infinite growth on a finite planet. We then look at what a Green economy might look like and how this departs markedly from ideas which invoke the same label propagated by institutions like the Organisation for Economic Cooperation and Development (OECD) and World Bank. Finally, we explore the range of strategies Greens employ and propose to build a green economy.