As countries around the world have urbanized rapidly over the past fifty years, infrastructure construction, particularly in the Global South, has struggled to keep pace. Many urban dwellers rely on sanitation systems that fail to adequately treat human waste, harming…

Agricultural soils around the world are under increasing pressure as urbanization covers once prime farmland with concrete and asphalt while intensified agricultural production degrades soil fertility. Yet even as their soils’ fertility declines, farmers around the world will be expected…