Hello brothers and sisters of different countries, We all know our foods are not without chemicals and other substances that are harmful for our health.We know the major cause is because most of the people in various countries do not have access to knowing what a food item contains and how harmful it is for their health.In many developing countries,the agencies which are responsible for checking the harmful contents in the food do not work properly and favour the capitalists. The result is the developing countries with the highest population become victims of unknown diseases. Mahatma Gandhi,in his book,tells that the best diet to avoid any disease is fruit and nut.But the problem is even the fruits contain chemicals that are sprayed on it for early ripening and other pesticides for killing pests. What if there is a machine in every home that can detect the harmful substance present in it and inform the consumer about the risks of the substance and how to get rid of it ? The problem is I don't have any idea how to do this or where to start this.I think millions of lives will be saved if someone volunteers to tell me about the possible ways to create that machine.