Cleaning up water.
D004203:Disinfection; D007391:International Cooperation; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D011158:Population Growth; D013501:Surface-Active Agents; D014873:Water Pollutants; D014881:Water Supply
D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D013501:Surface-Active Agents; D014873:Water Pollutants