Activists carrying billboards warning about the destruction of the seas are seen during an environmental rally held in Luis de Camoes square. Lisbon, 07 June 2023. The protest against deep sea mining is an initiative of Portuguese environmental non-governmental organisations in anticipation of World Oceans Day, under the slogan ''Join us to give voice to the deep sea'' which denounce the use of heavy machinery that destroys marine ecosystems. (Photo by Jorge Mantilla/NurPhoto) (Photo by Jorge Mantilla / NurPhoto / NurPhoto via AFP)