![An overly tall bench installed on the river bank in Copenhagen An overly tall bench installed on the river bank in Copenhagen](https://static.euronews.com/articles/stories/06/68/43/56/1200x675_cmsv2_981ae1bd-3746-5290-a986-2bb37f40e67a-6684356.jpg)
Marine heatwaves 'spreading like wildfires,' warn experts
Interview: Why are marine heatwaves on the rise?
Video. Denmark has built weirdly tall benches as a warning - but what is it?
These benches are 1 metre higher than they should be and the sea level in Denmark soon could be too.
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