Today, the Niger Delta, the cash-cow of the Nigerian economy, is notorious for two unsavory outcomes of oil activities in the region: environmental degradation and the subsequent militancy that resulted from the unchecked activities of oil corporations. Literature from the region subsequently reflects and refracts the ecological situations and instances of militancy in the Niger Delta. Although many studies have paid critical attention to the environmental concerns of the Niger Delta, very few have considered the less popular text of Chiemeka Garricks, which situates eco-activism in the Niger Delta with the restiveness of the youths in the area and the attendant socio-political issues it brings to the fore. Garricks presents the Niger Delta youth as a group that is disenfranchised economically and also sabotaged environmentally. This paper interrogates the tropes of eco-activism situated in the Garricks’ Tomorrow Died Yesterday (2010). It traces the environmental concerns and how the novelist has positioned his characters as key stakeholders or voices in environmental advocacy. The study relies largely on Ecocriticism to underpin the economic emasculation of the Niger Delta people and the environmental degradation caused by oil activities. It also borrows from Lawrence Buell's second-wave eco-critical theoretical position to examine the environment and advocate for the environment and the victims of environmental degradation.