Les substances perfluoroalkylées et polyfluoroalkylées (SPFA), plus connues sous le nom « PFAS » (de l’anglais per- and polyfluoroalkyl substances), également appelées polluants éternels du fait de leur persistance dans l’environnement1, autrefois aussi dénommées composés perfluorés, sont des composés organofluorés synthétiques comportant un ou plusieurs groupes fonctionnelsalkyle per- ou polyfluorés. Elles contiennent au moins un groupement perfluoroalkyle –CnF2n–2,3. Il existe probablement entre six et sept millions de PFAS4. Source : wikipedia
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An investigation by conservationists has found evidence that deep-seabed mining of rare minerals could cause “extensive and irreversible” damage to the planet.The report, to be published on Monday by the international wildlife charity Fauna & Flora, adds to the growing controversy that surrounds proposals to sweep the ocean floor of rare minerals that include cobalt, manganese and nickel. Mining companies want to exploit these deposits – which are crucial to the alternative energy sector – because land supplies are running low, they say.
Two of the UK’s leading hospitals have had to cancel operations, postpone appointments and divert seriously ill patients to other centres for the past three weeks after their computers crashed at the height of last month’s heatwave.
Blistering heatwaves are just the start. We must accept how bad things are before can we head off global catastrophe, according to a leading UK scientist.
The IPCC is unequivocal: we must take urgent action to curb global heating and prevent catastrophe. Will our policymakers and the Cop26 conference be up to the task?
The scientist who has borne the full brunt of attacks by climate change deniers, including death threats and accusations of misappropriating funds, is set to hit back.
The scientist who has borne the full brunt of attacks by climate change deniers, including death threats and accusations of misappropriating funds, is set to hit back.
