tjabane tjabane works. he's a shift foreman at the muela hydropower plant. the plant operates 24 hours a day to keep lesotho supplied with electricity. tjabaneoes rounds every day, checking the huge turbine halls where the generators are powered. it's warm and damp down here. lesotho relies almost exclusively on clean hydropower - completely free of environmentally damaging co2 emissions. and that's not set to change any time soon. >> the station is designed for 72 megawatt which means we need something like another 50 or 60 megawatts. but if we build the second tunnel and that mean the same power output -- that means lesotho will have more than it needs. >> 30,000 liters of water per second flow from the lesotho highlands to south africa, where it's needed by households and industry. among the beneficiaries is the municipality of emfuleni, home to roughly one million. emfuleni has been selected to set an example for municipal water conservation in south africa. every day scores of plumbers set out because nearly two thirds of the water from lesotho is lost due to dripping taps and damaged pipes. the project is financed to the tune of one mi