 There are more than 7 billion people in the world. 20% of this population don't have proper access to sanitation, which means that 1.8 billion people don't have access to toilets or lettreens. If we look at 2030 and we keep the same way, there would be more than 2 billion people without access to sanitation. A number that should be zero. Most of these people are located in developing countries, or are in formal settlement dollars or live in rural areas. For example, South Sudan only has 6% of proper access to sanitation. Open defecation and hunger lettreens transfer disease such as cholera or diarrhea. That happens when people are in direct contact with feces or indirectly via food contamination or soil contamination. This affects directly to the human well-being and to the social and economic development. So we might think, why don't we bring the traditional infrastructure of the western world? This is a power plant, wastewater power plant of Boston, which brings it genetically and quickly the waste away from our homes. They are collected and transferred to this place, which goes through a tedious process to end up dumping the effluent 15 kilometers away from the shore. So we have spent millions of dollars to create the sewer lines to build infrastructure, to maintain, to see signals like this along the Charles River. So this centralized infrastructure won't be able to serve in developing rapid urbanization areas. So that's why my team and me, have been researching into the centralized solution that we have booked in our toolkit. These solutions don't rely on old-fashioned centralized solutions. And this is what Bill Gates and his foundation have been doing with a unique device of a scale of a toilet that doesn't rely on water supply and on sewers. This device separates fluids from the waste and then burns the waste. And then with the fluids gets separated and storage for another uses. Another technology is what NASA is researching about. They recycle human urine, and it can be used for food purposes, for drink, or for aging. They have also been working with Penn State with some microbes that can take human waste and transform it into something edible. Another research team from Cape Town is been working with some bacteria that create a certain enzyme that can break down urea. This, joined with certain molecules and carbon dioxide can create material construction like this brick at a room temperature. Another group of designers have came up with a toilet for a scale community that can be delivered to remote areas and can be 3D printed, and they also transform waste into electricity. These are some of the solutions of the grid that can be used for these rapid urbanization areas, but they can also get bring back to western places because only in the U.S. there is more than 600,000 miles of sewage lines, which has an average of 33 years old and which takes billions of dollars and a lot of years to be replaced. So why don't we give a better use to this money? Because we know what is our goal, although we might not know how to do it, but we know that this is our priority, a world without a lack of access to sanitation. Thank you very much.