Convert rubbish to land
We've got loads of trash in Hong Kong. The superpower we all need is one that consumes rubbish at an unprecedented level and defecates habitable land. Yeah okay, it sounds outrageous but Tokyo already has islands made out of rubbish – research Tokyo’s Central Breakwater landfill if you don’t believe – and plans to use them for the 2020 Olympics. If they have that power it’s something we need here, pronto.