Heating homes using abandoned coal mines
Coal is one of the largest contributors to greenhouse gas emissions in the world. So when we talk about clean, green energy, coal doesn't jump out as a front-runner. But now many of the long-disused and formerly polluting coal mines across the world have been given a new lease of life and are being repurposed to heat homes, offices, and more.
Video by Alice Anderson
Executive Producer: Camelia Sadeghzadeh