 One of the typical types Rotterdam tries to promote is what we call the water square We use the water square to store a peak rainfall during what peak rainfall events? Big rainstorms, but during normal days. This is a public playground for children For students, and we also involve the local community To design those squares. So it's their square. They adopt it really For cities, we see I think more and more integration of blue and green infrastructure as we engineers like to call it So more and more public parks that better a combination of let's say water management typically engineering stuff that typically happens underground and Urban design, urban planning, livability that typically happens above the ground and this should more and more become a happy marriage between the two Where this in the end is more cost efficient on one hand, but also adds really to the quality of our environments