Greening the Blue Annual Report 2025 - The environmental performance of the UN system

United Nations 2 months ago

The 2025 edition of the Greening the Blue Annual Report presents the environmental performance of the UN system in 2024, covering operations of headquarters and field offices worldwide. 60 UN system entities have submitted performance data for this Report, corresponding to the activities performed by 312,084 members of personnel. The UN system has achieved notable reductions in emissions and environmental impacts in the past years, and since 2019. Notably: total GHG emissions dropped by 7.2% from 1.54 million tonnes of CO2 eq. in 2023 to 1.43 in 2024. A 29.7% reduction in total emissions was achieved in the 2019-2024 period; GHG emissions per capita have dropped by 4.2% from 2023 to 2024; a 29.5% reduction was achieved in the 2019-2024 period; per capita waste dropped by 5.74% from 2023 to 2024, a 36.7% reduction was achieved in the 2019-2024 period; per capita water use decreased by 12.5% from 2023 to 2024, a 19.2% reduction was achieved in the 2019-2024 period. The UN system entities remain committed to strengthening collaboration to adapt their ways of working to further reduce emissions while maintaining the positive impacts and legacy of the UN system to the world.
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layersDaily Sustainability Digest

Published about 4 hours ago



Sustainable construction is now central to major global building programmes as developers integrate measurable climate performance into every project stage. Across technology campuses and affordable housing, sustainable building design is advancing from concept to delivery through rigorous whole life carbon assessment and lifecycle assessment methods. The shift signals a maturing approach to environmental sustainability in construction where both embodied carbon and operational energy use are tracked to support net zero whole life carbon outcomes.

Architects and engineers are focusing on low carbon design aligned with breeam and emerging frameworks such as breeam v7 to quantify and reduce the carbon footprint of construction. The emphasis on low embodied carbon materials and renewable building materials is improving resource efficiency in construction while enabling circular economy in construction models that extend asset value and reduce waste. Life cycle cost analysis is becoming a critical metric for investors seeking robust returns from energy-efficient buildings and low carbon construction materials that meet net zero carbon and carbon neutral construction goals.

Developments across the United States and Asia illustrate how sustainable building practices are tied to local climate realities. Water scarcity, flood exposure and landslide risk are shaping sustainable urban development that privileges eco-design for buildings optimised for local conditions and sustainable material specification based on environmental product declarations (EPDs). The sector recognises that building lifecycle performance must integrate decarbonising the built environment with social inclusion to ensure that green construction and eco-friendly construction are equitable as well as efficient. A related example can be found where Indian townships are rebuilding after landslides but not all residents benefit equally.

Sustainability in construction now rests on measurable action: reducing embodied carbon in materials, applying circular construction strategies including end-of-life reuse in construction, and using green building materials within low-impact construction frameworks. These innovations demonstrate that environmental impact of construction and carbon footprint reduction are not aspirational goals but operational standards defining the future of sustainable architecture and the global transition towards truly net zero carbon buildings, similar to principles seen in new models for living in the Mountain West.

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