The Greens are the political group where the support for the implementation of a basic income (BI) is wider. Nevertheless, the reasons for that support are not always clear and quite often not related to environmental issues. The question is then to know if there’s a green case for BI or a case for BI by the Greens. Being overconsumption in the wealthier countries one of the main causes for global climate change, and knowing that, on average, consumption increases with the income, wouldn’t a BI foster the consumeristic lifestyle responsible for those climate impacts? Can there be a green case for BI? Two different approaches to a green BI - environmental and ecological – will be compared, with a particular focus on the latter, which can be seen as a radical green case, intended to supportthe transition to a post-productivist society.

The research on a green BI will be made with a green republican approach. Despite the several overlap areas between the political theory of republicanism and basic income, the research on those common aspects in still incipient. We will focus on how republicanism can be "green" and how non-domination can be an element of ecological sustainability and human flourishing.