 I'm going to talk about the potential impact of a citizen-driven air quality measurement project. So what can be achieved in the end through such project is a question that have been asked quite a lot. So I thought it would be interesting to focus on this topic and to try to clarify it as much as possible. So I will start by giving you a situation. So there is a child. He sees his father playing with some sort of electronic device. Air quality has no idea of what it is, but he's being curious as any child would be. So he asks him, what is it you're playing with? So the father explains that it's a device that will help him measure the air quality. And so the child asks him, why do you want to measure air quality and what does it even mean? So this will start an indicative process about the effect of air quality on health of air pollution because we can't see it. We need to be thought about it in order to know it exists. It is valuable for them and for anyone to understand phenomenon such as quality and air pollution so they can touch this reality and make decisions in the future knowing what they imply. I find this sensor and the map of air quality people make together an awesome way to interest people and bring them together, make them feel involved and make them aware in the end. It's a good mean to teach them how air pollution works and with a scientific approach. So the first big point I'm going to talk about is, I'm talking about is awareness. So I gave the example of a child but this is applicable to anyone. This awareness is critical to improve the capacity of people to address environmental issues. In short, people need to know how air quality works and why it matters so they will be able to take the good decisions. So after you know how air pollution works and why it matters, you need to understand it for a specific time and place which bring me to understand the current situation. So it's important to understand the pollution, how it's concentrated, how it occurs and the different trends to take action and fight it efficiently. Personally but also on a national level with efficient policies. It's also hard to take position personally when you have no idea of what the current situation is nearby your home. So the process would look like this. First we measure the air quality also called data collection, you can call it however you want. This helps us understanding the current situation in a specific time and place and this understanding can help us taking efficient action whether they are personal or national level. And before the data collection on the left there is awareness indication which I just talked about earlier. I will end with an example that illustrates really well the potential impact of such a project. It happened with real achievements in Australia. So an independent agency of the federal government called CYRO gathered schools and citizens to collect marine debris around Australia's coastline. So here is the map of the site they covered. So the idea was that they went to schools and taught teachers how to collect the data in an efficient way and how to teach the children of the classes how to do it well. So they went on those sites and collected the trash and counted them and classified them into different ranges whether it's metal, plastics, organics and so on. And the results were really good. They discovered that the quality of the data collection was as good. So the ones done by citizen scientists were as good as the ones done by researchers. So they managed to achieve four things through this program. The first one is the promotion of science education and learning. So by incorporating scientific courses and approaches before the data collection process. The second one was the creation of awareness about the effect of nature of human and non-human debris on the coastlines. The third one was the collection of a huge amount of data without compromising the quality of this one and with very few costs because every citizen scientist was doing it for free. To come back with what was just said earlier, I think it's really important to work in complementarity with the public data in order to be efficient and not trying to oppose each other. And so thanks to this data collection they were able to take efficient decisions on where to do prevention of debris and trashes whether it's from humans or non-humans. In conclusion, I think that those achievements can be reached through this citizen-driven air quality measurement program. So first the promotion of science education and learning as I talked about at the beginning. It's a really interesting way to bring the interest of people and teach them about how air pollution works in general or for our health or on a global scale. So on Wednesday there was also a civic atelier where people learned how to collect data and how to analyze data in an efficient way. It's another example of the promotion of science and critical thinking in general. So the creation of awareness, I talked about it at the beginning so when you know how air pollution works I think it's pretty obvious that you understand why it's important to care. And so collecting more data can be done thanks to the citizen-driven approach and this wouldn't be possible with so many citizens coming together around this project. And so with all this data we would be able on a personal level and on a national level to take efficient decisions to improve in the end the way we live and the air we breathe. So I will let you on a quote from Peter Drucker, the father of modern management that said what gets measured gets managed. Thank you for your attention. If you have any questions feel free to ask.