Israeli companies are harnessing natural forces, from bacteria to ultraviolet light, to treat, disinfect and reuse water. After decades of developing water technologies, Israel is now exporting them at a time of heightened international concern about water shortages. Reuters reporter Darcy Lambton has more. Israeli companies are harnessing natural forces, from bacteria to ultraviolet light, to treat, disinfect and reuse water. After decades of developing water technologies, Israel is now exporting them at a time of heightened international concern about water shortages. Reuters reporter Darcy Lambton has more.