> Kew lies at the western end of a 40-mile stretch of the Thames that in 1957 was declared unable to sustain animal life. The river had become so grossly polluted with emergency sewage discharges and heavy metals from road run-off and industrial waste dumping that there was a complete absence of fish between Kew and Gravesend on the Thames estuary. […] Something had to be done. From 1976 all raw sewage was banned from entering the river. More water-treatment works were opened. […] But London’s river, in many ways the country’s showpiece waterway, did benefit from its initial clean-up. Salmon, flatfish and eels returned to the Thames.
How does that work? Surely salmon don’t live for 20+ years.
Would they have moved fertile eggs from another river into the headwaters?
Flick 🇬🇧 /
npub1lm…n85vl
2024-08-29 19:18:18
Author Public Key
npub1lmksrgs7e5w5gz53fgq38py0dw3yfjdyur2nv0vg7rspce6sr4lqqn85vlPublished at
2024-08-29 19:18:18Event JSON
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"content": "\u003e Kew lies at the western end of a 40-mile stretch of the Thames that in 1957 was declared unable to sustain animal life. The river had become so grossly polluted with emergency sewage discharges and heavy metals from road run-off and industrial waste dumping that there was a complete absence of fish between Kew and Gravesend on the Thames estuary. […] Something had to be done. From 1976 all raw sewage was banned from entering the river. More water-treatment works were opened. […] But London’s river, in many ways the country’s showpiece waterway, did benefit from its initial clean-up. Salmon, flatfish and eels returned to the Thames.\n\nHow does that work? Surely salmon don’t live for 20+ years. \n\nWould they have moved fertile eggs from another river into the headwaters?",
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