Today, we will talk about one aspect of global problem, they say as water purification. We have been studying for years how to deal with water pollution. And yet today, we still face the challenges of how we can purify water. There is an organization called CBAN foundation that is working on this problem and focusing on human health. Unlike the underdeveloped countries, the developed countries are fortunate and have access to bottled water. They have also water access through the tap, but pure water is a still global problem and we need to solve this as quickly as possible. One solution came by to introduce nanotechnology and both countries that have all have not sufficient water. All sorts of technology will be used to find the corresponding solutions. And we can expect the problem can be solved very soon.