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Carbon nanotubes (CNTs) are a unique carbon material with physical, chemical, mechanical, optical, structural, and electrical characteristics researched and tested for a wide range of uses. The safeguards of environmental health have been identified as one of the most critical sustainability goals in recent decades. When it concerns identifying atmospheric toxins, carbon nanotube-based detectors offer great sensibility and precision, along with carbon nanotubes displaying the ability for adsorption to remove impurities with great rates and excellent amelioration competency. Carbon nanotubes have made essential contributions to a responsible future in wastewater treatment, air pollution management, biotechnologies, nano sensors, and sorbents. Carbon nanotubes are also utilized as a reinforcing material in green nanocomposites, which are essential for achieving desired characteristics and are ecologically benign. The utilisation of carbon nanotubes as hybrid filters, nano sensors, sorbents, and other materials is covered in this chapter, as well as its advantages for the environment.