 We have five principles that underlie our vision of the cities of the future. It is about reducing the amount of water we're using, reusing the water a few times before releasing it, recovering the energy that is embedded in the wastewater or resource water, recycling the nutrients that are in that water, and then the last one is about replenishing our surrounding environment, about regenerating the resources that we are using so that we have a risk-resilient and regenerative city that is inspired by ecosystems by the way natural ecosystems work and operate.