MUZO, Colombia — Although he has helped transform Colombia's emerald industry ... tabs on air quality and pumps remove excess water from the mine floor. Telephone and internet services have ...

Flood water from a disused mine is being used as a renewable source of heating for the first time in Wales. The business near ...

Some of the work completed includes upgrading water supply and water storage ... In the 1950s and 1960s, Gravelotte was the largest emerald mine in the world, and 113-million carats were recovered ...

the Environment and Water. The mine, located near Emerald, is operated by Sojitz Blue who purchased the mine in 2018. An application to expand the mine’s operation, within its mining licence ...

Inside the emerald mines that make Colombia a global ... while monitors keep tabs on air quality and pumps remove excess water from the mine floor. Telephone and internet services have been ...

Mine water treatment sites across Wales already process enough water to fill the Principality Stadium 10 times over each year Flood water from a disused mine is being used as a renewable source of ...