Two life-size whales made of willow are being unveiled in Bristol's Millennium Square this weekend - but they're marooned in a 'sea' of 70,000 plastic bottles.
The temporary art installation, designed and built by Cod Steaks and initiated by Artists Project Earth, is there to mark Bristol's status as European Green Capital - and to challenge Bristolians to use fewer single-use plastics like supermarket shopping bags.
Bristol is now half way through its year as European Green Capital - Mayor George Ferguson said he wanted the title to celebrate Bristol's environmental achievements, and act as a catalyst for change - in other words, to make the city even greener.
But with six months in, how well is it achieving those aims, and and what sort of things is the money being spent on?
Caron Bell reports.
An ambitious year for Bristol began with an ambitious and stunning high wire crossing in the Cumberland Basin.
Crowds held their breath as Hollywood couple Jade and Karine lit up the night sky, officially launching the city's year as European green Capital.
Thousands turned out in Bristol last night to mark the start of the City's year as European Green Capital.
Bristol is the first UK city to be given the status and kicked things off with high wire stunt 100 feet above the ground.
Mayor George Ferguson even took a step away from his traditional red trousers to support the city's green ambitions:
The last minute touches are being put into place for a ceremony in Bristol tonight marking the city becoming the European Green Capital. The dress rehearsal took place last night including a high wire display almost 30 metres (100 ft) above the city.
Events are taking place across the city to celebrate Bristol's year as European Green Capital.
The Victoria Rooms in Clifton have been lit up bright green in honour of the title, as well as the Wills Memorial Building on Park Street.
Have a look:
Stunned Bristolians caught a glimpse of something very special today - a world-famous stuntman practised cycling across a 120-metre high wire 27 metres in the air - a rehearsal for tomorrow's Bristol Green Capital opening ceremony.
Jade Kindar-Martin agreed to wear a small camera for us as he performed his daring feat - here is what the world looks like from his point of view.
Tomorrow's dramatic encore. which is free to the public, will take place at 7pm tomorrow as part of the European Green Capital Opening Ceremony.
Some of the best vantage points include, Greville Smyth Park, Ashton Road and the Cumberland Basin, Hotwells.
World-famous tight wire artist Jade Kindar-Martin will cycle 120m between the Bond warehouses in Hotwells as part of Bristol's Green Capital celebrations this weekend. He'll be 27 metres above ground with a trapeze artist suspended below him.
Watch his astonishing 2012 feat of high-wire daring between two hotels in China.