It turns out that trees can do more than just provide power! The Moringa tree, which grows in Africa, India, South East Asia, and Central and South America, is drought resistant and capable of producing cooking and lighting oil, soil fertilizer, and nutritious food. In addition, it has be recently publicized that the seeds can reduce the bacteria count in previously untreated water by 90.00 – 99.99%! Although the process can be quite involved, it still has the potential to allow people to have unrestrained access to clean water.
Read a bit more at Gizmag.com, or read the entire article as published in Current Protocols in Microbiology.