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While the world's attention is often captured by rising sea levels, another critical environmental crisis is unfolding beneath our feet: land subsidence.
Cities across the globe are literally sinking, a phenomenon largely driven by human activity. This insidious process is accelerating flood risks and posing an immediate threat to millions of people. Land subsidence refers to the gradual lowering of the Earth's surface; unlike dramatic coastal erosion or storm surges, its effects are often slow and less visible, yet the consequences are profoundly damaging.
Nowhere is this crisis more evident than in Jakarta, Indonesia's sprawling capital. Ranked among the fastest-sinking cities globally, its residents constantly battle escalating floodwaters. Homes require repeated elevation, and urban infrastructure is perpetually strained. Jakarta's dire situation serves as a stark warning for other urban areas facing similar threats worldwide. The problem extends far beyond Indonesia. A recent study, examining 48 coastal cities, revealed that an alarming 76 million people live in areas sinking at least 1 centimetre per year. This rate of subsidence significantly intensifies the impact of rising sea levels, transforming what might be manageable coastal changes into devastating, widespread inundations.
So, what's causing this widespread urban descent? The overwhelming evidence points to excessive groundwater pumping. As urban populations boom and development accelerates, the demand for fresh water skyrockets. To meet this demand, cities heavily rely on extracting water from underground aquifers. When water is pumped out, the empty spaces within the soil and rock layers compact, causing the land above to settle and sink. This issue is particularly severe in rapidly developing and populous regions like Asia and Southeast Asia. It's a cruel irony: the very urban development intended to uplift communities often contributes to their gradual sinking. The weight of heavy infrastructure, combined with the continuous demand for water, creates a perilous cycle. While engineers devise large-scale solutions like massive sea dykes and powerful pumping stations, these are often reactive measures, temporary fixes that don't address the core problem.
Despite the widespread challenges, solutions exist. Tokyo, Japan, once a rapidly sinking city, provides a compelling example of successful mitigation. Through strict groundwater pumping regulations and the implementation of a comprehensive water supply management system, Tokyo has managed to significantly slow and even halt its subsidence. This achievement underscores the critical importance of sustainable water management practices and robust urban planning.
The sinking of our cities is a complex issue, intricately linked to climate change, population growth, and resource management. Addressing it demands a multifaceted approach. We must invest in alternative, sustainable water sources, implement and enforce rigorous controls on groundwater extraction, improve the resilience of urban infrastructure to withstand ground movement, and educate the public about the causes and consequences of land subsidence. If we don't fundamentally rethink how we manage our precious water resources and plan our urban futures, many of our most vibrant cities risk becoming submerged histories. The time for decisive action is now.
Video from the USGS (United States Geological Survey) showed on Friday (19 September) the Kilauea volcano in Hawaii erupting and spewing lava.
At least eight people have died and more than 90 others were injured following a catastrophic gas tanker explosion on a major highway in Mexico City’s Iztapalapa district on Wednesday, authorities confirmed.
At least 69 people have died and almost 150 injured following a powerful 6.9-magnitude earthquake off the coast of Cebu City in the central Visayas region of the Philippines, officials said, making it one of the country’s deadliest disasters this year.
Authorities in California have identified the dismembered body discovered in a Tesla registered to singer D4vd as 15-year-old Celeste Rivas Hernandez, who had been missing from Lake Elsinore since April 2024.
A powerful 7.4-magnitude earthquake struck off Russia’s Kamchatka Peninsula on 13 September with no tsunami threat, coming just weeks after the region endured a devastating 8.8-magnitude quake — the strongest since 1952.
Azerbaijan is stepping up its renewable energy ambitions with plans to develop eight new solar and wind plants by 2027, backed by $2.8 billion in investment and aimed at exceeding its 2030 climate targets ahead of schedule.
On the second day of Baku Climate Action Week (BCAW), attention centred on strengthening international cooperation, accelerating the transition to clean energy, and ensuring a fair and inclusive approach.
Super Typhoon Ragasa lashed Hong Kong with hurricane-force winds and torrential rain on Wednesday.
When Climate Week kicks off in New York City on Sunday (21 September), it will mark the largest event of its kind yet, with organisers reporting a record number of companies participating and more events than ever before.
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