Introduction: The aims of this experiment are, firstly, to investigate the ability of duckweed (Lemna minor) to remove nitrate pollution from water and thus act as an organic and inexpensive way of combating eutrophication in water sources. Secondly, the relationship between nitrate concentration and rate of removal of nitrates by duckweed shall also be investigated. The duckweed is expected to absorb the nitrates as it grows and therefore lower the levels of nitrates in the water. In addition to