You have to 'seal' it to believe it! The River Thames – despite being "so polluted it was declared biologically dead" in the 1950s – has bounced back! There are now more than 3500 #seals to prove it! @wef: weforum.org/agenda/2019/09/t… @ZSLconservation:
ZSL

The UK’s River Thames has come back to life – with a seal population to prove it

In the 1950s, the Thames was so polluted it was declared biologically dead. But today it’s thriving – and a recent count of baby seals shows how far it has come.

weforum.org

Nov 6, 2019 · 12:15 PM UTC
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