Kamoto Mine sits in the former Katanga Province of the Democratic Republic of the Congo, part of the copperbelt arc that curves south into Zambia. Gecamines, the state mining company, opened the underground operation in 1969. Through the 1980s the mine produced three million tonnes of ore annually, a scale that bent the regional economy around it. When Kamoto closed in October 1990, it had given up 59.3 million tonnes of ore. The seams it drew from were not exhausted. The country was. Economic collapse and political crisis emptied the workings; the pumps stopped; the tunnels filled with water. For sixteen years the mine lay drowned beneath the Katanga plateau, waiting.

A 2006 feasibility study concluded that Kamoto could be revived at surprisingly low cost. The rooms-and-pillars were mostly intact. The metallurgical plant at Luilu, in operation since Gecamines fired its roasters in 1952, needed only upgrades rather than replacement. The owners - the Kamoto Copper Company, a joint venture between Katanga Mining at seventy-five percent and Gecamines at twenty-five - brought in trackless equipment, new ventilation, and a modern stoping technique that let them chase the seams more aggressively than the old room-and-pillar method allowed. Katanga Mining itself passed into the hands of Glencore, the Swiss commodities giant, whose name would soon become inseparable from the mine's. By 2020 the company announced that Kamoto was ramping toward 270,000 tonnes of copper cathode and 25,000 tonnes of cobalt hydroxide a year.

There is a cost to these numbers, and the Luilu River has paid most of it. From at least 2009 through 2012, the Luilu metallurgical plant discharged heavily acidic waste directly into the river - a Swiss NGO measured the effluent at pH 1.9, essentially battery acid. People living downstream report that fish no longer survive in the water. The tailings dams above Kolwezi hold an estimated 1.676 million tonnes of residual copper and 363,000 tonnes of cobalt, and on dry windy days the dust drifts over nearby neighborhoods. In November 2018 the mine paused operations entirely after uranium was detected in its cobalt shipments, a reminder that the copperbelt's geology is messier than its spreadsheets suggest; the company began installing an ion-exchange system to separate the two metals.

The Kamoto story cannot be told as a story about rocks. It is a story about who benefits from what the rocks contain. The Congolese state owns one-quarter of the operation through Gecamines, but a much larger share of Katanga's mineral wealth flows outward - to refineries in Asia, to battery factories, to the cars of people who will never see Kolwezi. The families living around Musonoi drink water from an aquifer next to tailings dams. Artisanal miners, working with their hands for a few dollars a day at nearby sites, feed into the same global supply chain that powers the energy transition. The tension at Kamoto is the tension at the heart of that transition: a cleaner future somewhere, purchased with harder lives here.

Approached from altitude, the Kolwezi region reads as a palette of rust and pale green - open pits cut into the plateau, tailings ponds shimmering in unnatural blues and grays, and the twin plumes of smoke and dust that mark the Luilu works. The landscape has the distinctive grammar of industrial geology: everything moving toward a central node, every road an artery. Rivers curve around the complex. Villages press up to its edges. From a cruising altitude the mine looks orderly, almost neat. It is only closer in that the cost comes into focus.