Singapore is testing a method that can almost halve the use of sand in reclamation projects, the country’s development minister says, in a timely piece of information for Hong Kong, which is facing a severe shortage of the material.The city state was experimenting with reclaiming low-lying land protected by dykes, which could cut sand consumption by 40 per cent, national development minister Lawrence Wong told an event in Hong Kong on Friday.“Reclamation is a massive endeavour. It’s costly ……