Ambitious construction programs for infrastructure and housing in Asia and elsewhere are leading to skyrocketing use of concrete, of which sand is a key ingredient. Mining of sand, a surprisingly high-stakes enterprise, comes with considerable human and environmental costs. Development researchers Associate Professor Melissa Marschke and Dr Vanessa Lamb join host Peter Clarke to pick the winners and losers in the often murky business of sand extraction in Asia. A podcast from Asia Institute of the University of Melbourne. Produced and edited by profactual.com. Music by audionautix.com.