A team of researchers at MIT in Boston says he tries to be able to eliminate 99% of the E. coli bacteria present a source of water by passing it through a filter obtained from the branch of a pine or other types of sapwood (the younger part of the wood of trees).

The filter developed by the researchers, who presented their proposal on the pages of PLoS ONE, is able to produce about 4 liters of drinking water per day and is designed for rural areas where it is difficult to install filtration systems advanced. In fact, explains Rohit Karnik, one of the authors of the study: "The filtration membranes of today have nanoscale pores that are not something that can be produced very easily in a garage. L 'idea here instead is that we do not need to manufacture a membrane because it is easily available.The system developed by researchers at MIT is also economical and ecological than the methods that use cleaners containing chlorine, membranes filtration or the same boil. The operating principle is inspired by the natural ability sapwood to filter particles larger than 70 nanometers, as told Nature World News. That is, enough to keep out bacteria but not viruses. At the moment the project of researchers is just beginning. The idea is in fact is to test different types of wood, assuming that they have some ability to filter better than others.