VIENTIANE, June 27 — Tenaga Nasional Bhd (TNB) and Electricite du Lao (EDL) have signed a memorandum of understanding (MoU) to explore the potentials of hydropower in Laos which is expected to generate returns of RM460 million to RM2.3 billion a year to TNB beginning 2025. It also has the potential to increase cross-border electricity...