South Korean toilet turns excrement into power and digital currencyMinwoo Park and Daewoung Kim 9 Jul 2021
It'll take more than a flick of a switch, but SA's energy future looks promisingBridgett Majola & Gavin Noeth 7 Jul 2021
Egypt notified that Ethiopia has resumed filling of giant damMomen Saeed Atallah, Omar Fahmy and Nafisa Eltahir 6 Jul 2021
Analysis - China's Bitcoin crackdown sparks fears of dirtier cryptominingUmberto Bacchi & Beh Lih Yi 30 Jun 2021
Sudan rejects Ethiopian plan to fill giant dam a second time - senior officialKhalid Abdelaziz 28 Jun 2021