This study examines Nnedi Okorafor’s “Lagoon,” combining African futurism with environmental themes to shed light on how the text influences our understanding of ecological activism from an African perspective. By scrutinizing Okorafor’s storytelling, this paper unveils the intricate ways the narrative integrates traditional knowledge and forward-looking visions, championing a sustainable and balanced relationship with our environment. “Lagoon” offers a vibrant depiction of Nigeria’s environmental challenges, highlighting the adverse consequences of petroculture while also displaying a joint effort among humans, non-humans, and extraterrestrial entities to address these environmental perils. The novel emerges as a poignant evaluation of environmental disregard and a tribute to collaborative resilience, presenting a compelling outlook of optimism and rejuvenation. This analysis locates “Lagoon” as a core element of African futurism, demonstrating how the genre can transcend mere conjecture to serve as a crucial tool for environmental advocacy and transformation. Through an examination of “Lagoon” from the perspectives of African futurism and environmental critique, this article illuminates the novel’s substantial contributions to both literary and ecological dialogues. It highlights the potential of speculative fiction not only to portray urgent environmental concerns but also to stimulate innovative thoughts and initiatives. In essence, this research stresses the significance of embracing indigenous perspectives and advancements in shaping sustainable futures, establishing “Lagoon” as a pivotal text that resonates with audiences and academics alike in its plea for environmental consciousness and accountability.