Four dams on a California river are set to be demolished, ultimately opening up hundreds of miles of salmon habitat in the world's largest river restoration project.
Efforts to bring back rivers that have been buried underground for over a century are underway worldwide.
The river Seine in Paris, France is getting a major cleanup - so much so that swimming competitions in the coming up 2024 Olympics will be held in the river!
In July 2022, the world's first "bubble barrier" was introduced in Katwijk, Netherlands.
