His Majesty King Bhumibol Adulyadej the Great employed natural principles to deal with problems or to improve unfavourable conditions to return to normalcy. His Majesty the Late King created the process of wastewater treatment by using water hyacinths to absorb polluted substances in the water. This is his own invention of the phase “Using Vice to Defeat Vice” as mentioned in an excerpt of His Majesty’s statement as follows:

         “… As you can see that sewage is vice. Water hyacinths which we do not want is also considered vice… So, I will use vice to fight against vice… and bring about Dharma (Virtue) out of it…”