Land is sinking underneath millions of peoples’ feet in China’s major cities due to human activities, putting the country’s coastal areas more at risk of flooding and rising sea levels, new research shows.
Nearly half of China’s urban areas comprising 29% of the country’s population are sinking faster than 3 millimeters (about 0.12 inches) per year, according to the study published Thursday in the journal Science. That’s 270 million people living on sinking land.
China’s rampant groundwater extraction is one of the primary factors for subsidence, researchers said. Cities have been pumping water from underground aquifers faster than it can be replenished, a situation exacerbated by climate change-fueled drought. Excessive pumping lowers the water table and causes the overlying land to sink.
The land is also sinking due to the growing weight of cities themselves. Soil can compact, naturally from the weight of sediments accumulating over time and from heavy buildings pressing down on the ground, causing the land to steadily sink.
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📸: AFP/Getty Images
Sustainable construction is moving from ambition to delivery as policy, procurement and building performance converge around whole life carbon, embodied carbon and life cycle cost.
Record uptake of Boiler Upgrade Scheme vouchers in Britain indicates that heat pumps are entering the mainstream for housing, retrofit and low carbon building specification. Germany’s 2045 phase-out of oil, gas and coal reinforces the direction for net zero carbon buildings across Europe: electrification, energy-efficient buildings and low carbon design are becoming market requirements, not optional sustainability claims.
The industry’s capacity to deliver remains the decisive constraint. Calls for stronger construction training and reskilling underline a core risk for environmental sustainability in construction: policy can drive demand, but competent labour determines whether sustainable building design performs in practice. The post-Building Safety Act regime raises the bar for building control, fire-safety competence and verifiable compliance.
Net zero whole life carbon ambitions depend on robust whole life carbon assessment, lifecycle assessment, sustainable material specification and evidence such as environmental product declarations (EPDs), not on poorly installed systems or untested green building products.
Circular economy in construction is shifting into practical specification. New guidance on reusing doors shows how embodied carbon in materials can be reduced through repeatable procurement, inspection, warranties and end-of-life reuse in construction. The next phase of green construction will rely on circular construction strategies, resource efficiency in construction, low embodied carbon materials and low carbon construction materials as much as new technology. Standards including BREEAM and BREEAM v7 will sharpen expectations for building lifecycle performance, carbon footprint reduction and credible eco-design for buildings. The sector’s credibility now rests on proving that sustainable building practices, eco-friendly construction and carbon neutral construction can withstand the scrutiny of installers, inspectors, clients and quantity surveyors.
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