人类消耗的第二大自然资源是沙子，仅次于水。我们的城市是用沙子建造的，这种日益减少的资源被许多关键行业广泛消耗。每年，从河流和海岸开采的沙子接近500亿吨，是自然补充速度的两倍。随着相关的社会环境影响越来越多，迫切需要可持续地管理这种需求资源。

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...