Sitography

• The SDG no. 6: Goal 6 | Department of Economic and Social Affairs; Home | SDG 6 Data
  
• The SDG no. 11: Unep
  
• European Commission website - “Commission takes Italy back to the Court and proposes fines”: Commission takes Italy back to the Court and proposes fines 
  
• European Union's Earth observation programme: Copernicus 
  
• European Environmental Agency: European Environment Agency
  
• United States Environmental Protection Agency – Constructed Wetlands: Constructed Wetlands | US EPA
  
• Treatment Wetlands: Treatment wetlands — Links and references (Department of the Environment, Tourism, Science and Innovation)