🚨🪸 Warming ocean temperatures have led to a global coral bleaching event, in which corals around the world are bleaching en masse. This is essentially a mass mortality event, as many of the corals that bleach likely won’t survive. These increasingly frequent events are threatening one of the most important ecosystems on our planet. Worldwide, an estimated one billion people benefit directly or indirectly from the ecosystem services coral reefs provide, including seafood, tourism income, and storm protection. Scientists once thought that 1.5 degrees Celsius of warming would mark a tipping point, leading to the collapse of 70-90 percent of coral reefs. Some scientists are starting to believe that the tipping point is actually at 1.2 degrees Celsius — meaning we may be dangerously close to that threshold. While local conservation efforts, like coral restoration, fishing regulations, and pollution prevention are buying us time, lowering our carbon emissions is the only real way to save our reefs—and it’s not too late. We need climate action now.
🎥 @dr.shireenrahimi
Special thanks: @eslam_o_osman @tinybeaker
Sources:
IPCC 2018: https://www.ipcc.ch/site/assets/uploads/2018/10/SR15_SPM_version_stand_alone_LR.pdf
Kelly et al 2024: https://esd.copernicus.org/preprints/esd-2023-35/#:~:text=Coral%20reefs%20face%20unprecedented%20threats,above%20350%20parts%20per%20million.
IPCC 2022: https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_SummaryVolume.pdf
McKay et al 2022: https://www.science.org/doi/10.1126/science.abn7950
Coral reef livelihoods: https://coast.noaa.gov/states/fast-facts/coral-reefs.html#:~:text=1%20Billion%20People,ecosystem%20services%20coral%20reefs%20provide.
The UK’s retrofit gap remains the defining issue for sustainable construction. The National Retrofit Hub’s call for a stronger national retrofit system exposes persistent weaknesses in standards, skills, finance and policy stability. Treating retrofit as national infrastructure would support whole life carbon reduction, improve building lifecycle performance and strengthen environmental sustainability in construction across the existing building stock.
Nesta’s finding that electricity bills are rising more slowly than gas could sharpen the business case for low carbon design. Heat pumps, electric vehicles and fabric-first upgrades become more attractive when assessed through life cycle cost rather than upfront capital alone. Developers, landlords and retrofit providers can position electrification as a route to energy-efficient buildings, lower exposure to fossil-fuel volatility and progress towards net zero carbon buildings.
Climate adaptation is now a core test of sustainable building design. Planting, shading, passive cooling, urban greening and green infrastructure are becoming essential responses to overheating risk, particularly for lower-income households. Eco-design for buildings must address summer resilience as well as winter efficiency, linking sustainable design with health, comfort and long-term carbon footprint reduction.
Major infrastructure remains the sector’s most difficult contradiction. Renewed uncertainty over Heathrow expansion raises questions about the carbon footprint of construction, embodied carbon in materials and the credibility of net zero whole life carbon policy. Large projects need robust whole life carbon assessment, lifecycle assessment and transparent sustainable material specification, supported by environmental product declarations (EPDs), low embodied carbon materials and circular economy in construction principles. Sustainable construction has the techniques; consistent governance is still missing.
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