International audienceIn January 2021, the Great Green Wall Accelerator was announced at the third One Planet Summit in Paris. Based on the notion of acceleration developed by Harmut Rosa and using the idea of conflicting temporalities in the study of social-ecological systems, this article analyzes how the political will to accelerate the Great Green Wall reveals power dynamics between Western and Sahelian countries. We put in tension this acceleration of the Great Green Wall with (1) temporalities with respect to nature and reforestation, and (2) temporalities of life among the Sahelian populations. Whereas our contribution is mostly theoretical, building on Hartmut Rosa’s work, we illustrate our approach in terms of political ecology and...