Tensions concerning environmental governance have increased in Brazil since the far-right came to power in 2016. We offer insight into this process by analysing the first two years of Jair Bolsonaro’s (2019-ongoing) environmental policies—namely, how Brazil’s environmental protection arrangements are being dismantled. We find that the Bolsonaro administration centralises environmental governance in Brazil through complementary authoritarian and populist means. First in restricting participatory decision-making spaces such as the National Environmental Council (Conama) and the National Council of the Legal Amazon (CNAL), and, second, by attacking indigenous and traditional peoples, NGOs, scientists, and other environmental defenders. To illustrate the authoritarian dimension of Bolsonaro’s environmental governance, we carry out a political-institutional analysis of contemporary Brazilian environmental politics and then exemplify the ways and extent to which attacks against environmental defenders is a constituent part of Bolsonaro’s environmental populism. We hold that such attacks are not merely rhetorical but a political tactic to legitimise Bolsonaro’s authoritarian environmental governance in the promotion of ‘total extractivism’ while maintaining a populist appeal.