 Okay, we are USA architects, Eva Pwanes and Silvan Achtender. I'm a German and I'm French and we have a practice in the Netherlands. Our interest in water started when we were invited to work on a project which was the Emsche Kunst in 2010 and we were actually facing a situation where there was a very dirty river, an open sewage and a very clean river next to it. And we, I think for a while we already were busy with this thinking about sustainability being a cycle, so real sustainability only happens when you think in cycles and so we tried to make a cycle between those two waters, the clean one and the dirty one and we ended up making a very small sewage treatment station which was like 80 meter long and 5 meter wide with all the different steps actually rendering the sewage eventually drinkable and working only with water from the site. And for us it was very important to have this closed-loop system in close relation to the human body or to the body, so to actually make people experience the different stages of water because water is actually the most important resources for humanity and for the earth and we are made of 66% of water. So that is all about balance, so we have to learn how to live with nature in a balance and that also extends to energy obviously. I think we see the infrastructure as part of architecture in a sense that is the, let's say it is the metabolism, like we have a body and we have a system inside our body and in a way the system of feeding our body and digesting the food is the most that's what keeps us alive and we all look differently, so we can say basically if the city, if the metabolism of the city is not working the city has a huge problem and so we can change the makeup but we need to really make the urgent things work properly and we need to address them and actually also find a way that people want to engage with them and I think that's why it's important that architects also deal with infrastructure because they know how to make things working, they know how to think in systems and with sort of a complexity of a city and how to integrate things into the urban space. There's also a notion of being mediator so because you understand different parts of the problems or the different like social, political, spatial, technical you can kind of mediate between all the different people and find a solution within, so a contextual solution which can basically sort out a lot of stuff. The artwork is very small utopias where we test the system on a very small scale in order for people to understand them, to trust them and we try to make the leap to the big scale that's what actually we're busy with here now. This pilot project is made to, it's a pedagogical tool to actually show to the people of the municipality, the people, the politicians, the engaged people in communities so we now starting a process of showing it and also demonstrated that it can work. Alright so how does it work the system? We have four different elements, we're sitting on one, we have the toilet next to us, we have the septic tank, we have the constructed wetland and the water system and those four system, four elements are connected and are in a closed cycle. The objective is to actually use this pilot to propose it to the municipalities and to other people to actually sort out within the city the problem of sewage and pollution. So for instance here specifically in Brazil there's a lot of pollution problems not only in the favelas but in a lot of rural areas especially here in Guarachiba there is actually no sewage at all. So it worked till a certain point but now the density of people living here is so high that the nature cannot actually process all this pollution. And I think as architects we're interested in this sort of how we deal with waste. So there's a sort of paradigm shift we think which needs to happen which is where waste is not something which happens which is dealt with somewhere outside the city, somewhere which we don't see, which is really far away, it's kind of under the carpet and we need to integrate it within the city in a decentralized way. So that is where this plant filter is really interesting because it just takes one to one and a half square meter per person and it can be integrated in the city in rural communities, favelas, condominiums etc. And it's an aesthetically pleasing element which can help deal with a very important issue. It's an engineered nature, it's nature in use and actually nature is much more powerful than any kind of super highly technical infrastructure we found. We believe that here it's really a place where you can kind of move on to a next step. So this idea of integrating nature in the city as an infrastructure is extremely relevant here. So the project that we did before was called Agua Cariocca and it we started with a research where we interviewed a lot of different players in the city, from municipality to activists to community leaders in the favelas and we worked in four different favelas in Marais, Rio das Pedras, Modo Salguero and Moda Formiga where we interviewed a lot of people so this research became a film and through this research we gathered ideas to also then make four different proposals to actually devise a strategy which we showed how it could work in four different proposals and this was exhibited at Studio X in the center of Rio and it was well received but it immediately led to the next question which is how does it look? How does it smell? How does it function? Does it perform? Is it real? Can it be tropicalized? We thought that Sieger Roberto Bollemax was always a great inspiration since we came first to Brazil. We loved this place and Roberto Bollemax was a very early defender, like an ambientalista, like a very busy with sustainable issues because he saw that it's important to keep the Amazon, to keep biodiversity, to keep all the species alive so we thought we could really connect to this spirit and moreover it has an immense plant collection and we were talking about the tropicalization before like especially using which plant species can be used for the constructed wetland. That is a big question and here we can dig into an enormous knowledge of the gardeners who work with Bollemax who know which plant has what kind of root and with the botanists from the team and together with them we were able I think to move to a new step so now we're testing I think seven different type of plants and see how they will perform. Change can only happen usually through crisis and the fact that there is a crisis of how to deal with sewage in this urban situation here can really help to develop an alternative, a new model, which actually in Europe it cannot because it's already developed but maybe in a wrong way or in a way which is already old so here something better can replace the system which is normally applied. We believe that somehow the municipal bodies or the federal bodies should actually kind of somehow take action and somehow finance this type of project because you can see that at the moment that like the infrastructure of the communities are definitely not sorted out and this is interesting because you in a way clear the problem within. There's also some part of the work there which is social which is actually to adapt a system like this which technically works to a kind of other social system to see if this can work in this other social system where you actually don't have a public. You have other sort of work, a big part of the work there would need to be the social to convince people and to make them want to try it out. I think ideally we would like to help, yeah to kind of bring up the awareness but to also realize some work so ideally we would like to go from here the next step to a larger pilot in a real situation. That could be a community, could be a favela, could be a rural part or could help cleaning a river so there is a kind of gap. There is a gap that we actually entering into starting to understand where is the gap between regulation what you need to do by law and what you don't do therefore which but it's still polluting somehow so that's very interesting for us because