Green campaigners say the melting of a sheet of ice covering a water feature in the Midlands city centre, is undeniable evidence of climate change.
The sheet - on the Waterwindow in Coventry - has been a feature of the city since the December Ice Age, and is starting to melt as temperatures rise.
"This is definitive evidence that the world is getting warmer and something needs to be done about it before this valuable natural resourse disappears for ever." Jacinta Horrigan told anyone who'd listen.
"This ice formed naturally in a defined period of cooling and now the authorities are letting is melt without intervening to protect what's left. It's diabolical."
"They've also been doing their best to break it up, by getting a man to smash the ice on a regular basis. This was done on the pretext of 'health and safety' but we know it's just wilful destruction and a further demonstration of how those in power are raping the planet."
However, a spokesman for Coventry City Council said the ice was a serious threat as people had been seen trying to stand on it and that Ms Horrigan only became interested in it when her niece told her about the ice sheet and had caught pneumonia by trying to skate on it.