Asia's Thirst for Concrete Depletes Rivers

Global demand for sand and gravel, crucial components of concrete, has more than doubled since the year 2000. This surge is primarily driven by Asia, which accounts for over 80% of current demand, largely supporting extensive urban development and road-building initiatives in countries like China and India.

The intensified extraction, particularly from rivers across Asia and Africa, is happening at rates several times faster than natural replenishment. This overextraction has significant environmental repercussions, including the weakening of riverbanks, a decrease in groundwater levels, increased salinity in coastal areas, and a decline in overall water quality.

To address these challenges, researchers suggest employing satellite imaging and river mapping for more effective management of sand and gravel mining. Furthermore, reducing demand through efficient material usage and developing sustainable alternatives like processed construction waste, recycled glass, and treated bottom ash are vital steps.