Jenna Ladd| August 21, 2017
This week’s On The Radio segment discusses how the international sand shortage is leading to the degradation of waterways.
Transcript: A global sand shortage is having detrimental impacts on waterways.
This is the Iowa Environmental Focus.
The demand for sand has skyrocketed in recent years due to rapid urbanization worldwide. Sand is used to make the concrete and asphalt for every new building, road, and residence. More than thirteen billion tons of sand were mined for construction last year, with 70 percent going to Asia.
At present, sand is being extracted too fast for natural systems to replenish. To keep pace with exploding demand, sand miners are dredging lakes and rivers, chipping away at coastlines and destroying entire small islands. Sand extraction in rivers often deepens the channel, making bank erosion more likely. Similarly, when miners remove sediments, they often also remove plant life, which can have adverse impacts on aquatic food chains.
More wealthy western countries are beginning to use sand alternatives. For example, asphalt and concrete can be recycled and crushed rock can be used instead of sand in some cases.
For more information, visit iowa-environmental-focus-dot-org. From the UI Center for Global and Regional Environmental Research, I’m Betsy Stone.