Gold mining company Gold Fields has revealed that is investigating the feasibility of installing additional solar and wind power at its South Deep gold mine, in South Africa. Interim CEO Martin Preece said on May 4 during the company’s first-quarter operational update that an additional 10 000 solar photovoltaic panels were planned for installation at the mine this year. However, he said the mine was reaching a limit in terms of how much solar could help before batteries had to be installed.