Runners already face a daunting challenge when they line up at the start of a marathon, but they might increasingly find themselves with another obstacle to reckon with: global warming.
A new study claims that rising temperatures around the world will make it harder for elite athletes to break the marathon world record, or for recreational runners to hit their target times.
Of the 221 races analyzed in the report from Climate Central released last week, 86% of them are less likely to have optimal racing conditions for runners by 2045.
That includes last Sunday's New York City Marathon and the other six major marathons around the world — London, Berlin, Tokyo, Chicago, Boston, and Sydney.
For runners, the consequences of running in hot conditions can be extreme.
"We've seen time and time again where athletes are passing out from dehydration and heat exhaustion during races and taking months to recover," Scottish distance runner Mhairi Maclennan told CNN Sports.
Read more at the link in @cnnclimate's bio.
📸: Craig T Fruchtman/Getty Images; Alex Davidson/Getty Images; Annegret Hilse/Reuters
Sustainable construction is transitioning from incremental efficiency upgrades to resilient, place-led strategies. Water scarcity in the Mountain West is driving a fundamental redefinition of sustainable building design, where hydrology, topography, and municipal capacity shape early planning decisions. These integrated approaches reflect the broader shift toward environmental sustainability in construction and circular economy principles underpinning regional growth. Corporate investment in low carbon design is intensifying as major technology campuses adopt whole life carbon assessment frameworks that align procurement, operations, and embodied carbon targets with long-term resilience rather than short-term optics.
Across housing, net zero carbon buildings and eco-design for buildings are moving from policy goals to financial reality. Community-focused developments in US cities demonstrate that low embodied carbon materials, lifecycle assessment, and life cycle cost analysis can underpin viable models that balance affordability with environmental impact of construction. Measured performance is beginning to outweigh render-led marketing, with success defined by building lifecycle performance under water stress, climate risk, or grid instability.
Governance remains the pressure point. Fort Worth’s redevelopment strategy shows that sustainable urban development and green infrastructure must be designed to avoid displacement, reinforcing the importance of life cycle thinking in construction and circular construction strategies. India’s landslide recovery demonstrates the cost of neglecting ecological integrity, strengthening the case for carbon neutral construction built on sustainable material specification and renewable building materials.
The energy transition remains uneven, exposing gaps in resource efficiency in construction and access to low carbon construction materials. Developers leading in decarbonising the built environment are integrating whole life carbon metrics with BREEAM and BREEAM v7 requirements, linking embodied carbon in materials to environmental product declarations (EPDs) and transparent end-of-life reuse in construction. Those employing circular economy in construction and adopting low-impact construction solutions are establishing the benchmarks for sustainable building practices and net zero whole life carbon delivery.
Sustainability is now measured through durability, adaptability, and the ability to deliver low carbon building performance across full lifecycle impacts. The industry’s value lies not in green building products or certifications alone, but in whether each structure contributes measurable carbon footprint reduction and lasting resilience within a truly eco-friendly construction framework.
Whole Life Carbon is a platform for the entire construction industry—both in the UK and internationally. We track the latest publications, debates, and events related to whole life guidance and sustainability. If you have any enquiries or opinions to share, please do
get in touch.
Let's chat!
WLC Assistant
Ask me about sustainability
Hi! I'm your Whole Life Carbon assistant. I can help you learn about sustainability, carbon assessment, and navigate our resources. How can I help you today?