Record number of dams dismantled in Europe in effort to help wildlife thrive

Weirs, culverts and sluices among 602 barriers demolished in year in attempt to restore 15,500 miles of rivers by 2030

A few miles downstream from a lava field in western Iceland, the gargle of free-flowing water is unbroken for the first time in decades after hydraulic peckers chipped away at a dilapidated dam that once powered a farm. The structure on the River Melsa had continued to block fish migration long after falling into disrepair.

It wasn't providing any electricity; the old power house had sheep living in it," said Hamish Moir, a river engineer from CBEC, a Scottish firm that provided technical support for the demolition in December. To see the river restored to its natural state was really rewarding", he said.