The unique features and adaptability of carbon nanotube-based sensors have made them an exciting new technology for environmental monitoring. Carbon nanotubes, which are composed of carbon atoms arranged in a cylindrical form, have extraordinary mechanical and electrical capabilities. Because of these characteristics, they may be used to create sensors that can identify various toxins in the environment. In this study, we'll go into the nature of carbon nanotubes, the many sensors built on this material, and their uses in environmental observation. We'll talk about some of the opportunities and threats facing this area of study right now. The ultimate goal of this work is to present a high-level summary of the social and environmental effects of carbon nanotube-based sensors for environmental monitoring. © 2025 Elsevier B.V., All rights reserved.