A smart city can provide the latest technology for people to collect information and manage resources and should have a clean and sustainable environment.
智慧城市可以为人们提供最新的技术，以收集信息和管理资源，而且应该有一个清洁和可持续的环境。
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Millennium Villages require continuing external inputs-not just fertilizer and other technology, but the money to pay for them-and that is not a sustainable solution.
But technology being developed by Torben Mikkelsen, of Risoe DTU National Laboratory for Sustainable Energy in Denmark, and his colleagues looks set to make the process easier.