This TL addresses challenges at the water-energy-environment nexus by developing innovative technologies to ensure clean water and energy and mitigate environmental impacts. It focuses on understanding the complex interactions between chemistry, water, and energy, aiming to advance research, training, and technology transfer. Environmental monitoring, pollutant removal, climate change mitigation, and sustainable industrial practices are key areas. The line supports achieving EU climate goals, enhancing resilience against climate change, and promoting a circular economy through advanced materials and recycling technologies.