More than 70 percent of marine protected areas worldwide are contaminated by untreated, or poorly treated, wastewater. That’s the conclusion of a new study by the Wildlife Conservation Society and the University of Queensland in Australia.
Excess nutrients found in wastewater can impede corals’ ability to grow properly and withstand increasing pressures from climate change. They also make the animals less tolerant to rising ocean temperatures and more vulnerable to bleaching—a stress response stimulated by warmer waters that causes corals to expel the colorful algae living in their tissues, turning them white.
Wastewater can reach the ocean in several ways. In some places, it starts with the absence of toilets, where rivers and beaches become the default option out of necessity, and waste is left to be washed away by rain and tides. In others, sanitation systems exist but do not keep the waste in check. Addressing this problem will require significant investment from governments as they continue to plan and fund ocean protection.
“Even a perfectly managed marine protected area will fail to achieve benefits for conservation and for people if wastewater keeps flowing in from upstream,” said Amelia Wenger, co-author of the study and global water pollution lead at the Wildlife Conservation Society.
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Sustainable construction is moving from intent-led specification to measurable performance, carbon pricing and climate-risk management. The reported move to link the UK and EU emissions trading systems could create a clearer market signal for manufacturers, developers and clients seeking whole life carbon reduction. A more coherent carbon-price framework would strengthen the business case for low carbon construction materials, lower-carbon steel and cement, and more rigorous sustainable material specification, particularly where embodied carbon in materials dominates the carbon footprint of construction.
The policy shift reinforces the need for whole life carbon assessment, lifecycle assessment and life cycle thinking in construction across design, procurement, operation and end-of-life planning. Net zero carbon buildings will increasingly depend on evidence-based low carbon design, transparent environmental product declarations (EPDs), and credible pathways towards net zero whole life carbon. BREEAM, BREEAM v7 and other performance frameworks are likely to gain greater relevance as clients demand proof that sustainable building design is delivering against regulation, finance and resilience expectations.
New research suggesting home insulation schemes may underestimate heat loss exposes a serious gap between modelled and actual building lifecycle performance. Energy-efficient buildings cannot be judged by design assumptions alone. Retrofit programmes need better installation quality, monitoring and verification if they are to deliver carbon footprint reduction, lower bills and reliable life cycle cost outcomes. Fabric-first strategies remain central to green construction, but only when real-world performance matches specification.
Climate adaptation is becoming a core part of environmental sustainability in construction. A national research network on property-level flood resilience, a new government flood-advice service and commitments to protect 200,000 properties show that sustainable building practices must address flood, heat and water stress together. Urban greening, active travel and public cooling schemes backed by Bupa and the Norman Foster Foundation point to a wider role for green infrastructure, sustainable urban development and sustainable architecture in protecting public health.
The sector’s challenge is now integrated rather than isolated: cut embodied carbon, improve retrofit reliability, reduce operational energy demand, apply circular economy in construction principles and design for a harsher climate. Circular construction strategies, resource efficiency in construction, renewable building materials, green building products and end-of-life reuse in construction are moving from optional enhancements to practical requirements. Eco-design for buildings, low-impact construction and carbon neutral construction will define credible progress in decarbonising the built environment.
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