sentences:  The system was similar to the one used in the Palabora copper mine in South Africa.Trolleytrucks were used in the Zambia Consolidated Copper Mines Nchanga Mine in Zambia from 1983 until later in the 1980s.Inexpensive hydroelectricity is generated at the Kariba Power Station along the Zambezi river and distributed throughout the "copper belt" of Zambia.