|ocean urea fertilization|
Similar to ocean iron fertilization, this is a geoengineering biosequestration technique where, instead of iron, nitrogen-rich urea is added to the upper ocean to encourage phytoplankton growth.
1. It is a controversial technique because its ultimate effects on the marine ecosystem are unpredictable.
2. An experiment was performed off Canada's west coast in October of 2012. Click here to read about it.