As millions of people move into cities every week, this puts a huge strain on space, city resources, energy requirements, and infrastructure cost. Cities are being forced to evolve to meet this increased demand, or collapse under the pressure. This is leading to an increase in the number of Smart City projects — smart grids, networked LED street lights, public Wi-Fi, water management, etc. — that are being implemented around the world, with the number of initiatives nearly doubling over the past few years.