The ‘Wastewater treatment solutions for climate mitigation: a practical guide’ serves as a comprehensive resource for wastewater practitioners, policymakers, and researchers aiming to reduce greenhouse gas emissions in the sanitation sector. With wastewater treatment contributing up to a level of global emissions comparable to aviation and cement production, this timely guide emphasizes the urgent need to align sanitation goals with climate action. The technical guide provides detailed methodologies for monitoring and quantifying emissions, explores mitigation strategies through planning and process optimization, and highlights policy instruments and technologies that support the transition to net-zero wastewater treatment.This guide is a collaboration between UNEP, UNEP-DHI and the Global Wastewater Initiative.
Sustainable construction is entering a decisive phase as regulation replaces rhetoric across architecture, engineering and infrastructure. The sector is adopting a measurable framework for environmental sustainability in construction, centring on whole life carbon assessment and verified data on embodied carbon in materials. Leading architecture firms have introduced a sustainability standard for glass, signalling that eco-design for buildings is advancing beyond marketing claims to measurable low carbon design outcomes.
Rising scrutiny of plastics in the built environment now combines lifecycle assessment and health-based evidence, accelerating the shift towards renewable building materials and circular economy in construction strategies. This evolution of sustainable building design aligns with the broader adoption of sustainable material specification and environmental product declarations (EPDs), ensuring that the carbon footprint of construction is tracked transparently across every stage of the project.
The incoming UK government faces intensifying pressure to clarify policy on retrofit funding, embodied carbon reporting, water resilience and the energy efficiency of data centres. Severe drought warnings and pressure on urban water systems underscore the urgencies of resource efficiency in construction and green infrastructure investment. These are becoming core metrics in whole life carbon accounting and life cycle cost evaluation, critical to achieving net zero carbon buildings and future-proofing green construction ecosystems.
Innovations in geothermal and renewable energy sources are redefining net zero whole life carbon trajectories, potentially transforming energy-hungry sites into models of carbon neutral construction. Low carbon construction materials and digital performance tracking are now integral to sustainable building practices and the broader decarbonising of the built environment.
The convergence of materials innovation, circular economy frameworks and decarbonised heat is reshaping sustainable architecture as a high-performance discipline. Industry leaders increasingly see sustainability not as compliance but as the essential business model for sustaining life cycle performance, achieving net zero carbon, and guiding the next generation of low-impact construction.
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