Our world is facing unprecedented challenges due to environmental pollution. Agricultural and industrial activities are increasing intensively due to the growing human population and, thus, increasing needs. These activities lead to the depletion of natural resources and a significant waste problem. Consequently, environmental pollution in our world is increasing and diversifying daily. From contaminated drinking water supplies to air filled with harmful emissions and soils tainted with hazardous substances, the consequences of pollution have never been more evident. Yet, despite the magnitude of these challenges, scientists, engineers, and activists worldwide are working hard to solve environmental problems. The effective removal of pollutants in air, water, or soil is vital for the future of our planet and environmental sustainability.