The project changed hands several times before it became real. Phelps Dodge acquired exploration permits in 1995, then sold its interest to the Canadian firm Dynatec in 2004 and 2005. Dynatec began development in 2007, backed by international lenders including the European Investment Bank. Sherritt International later absorbed Dynatec and eventually handed majority control to Japan's Sumitomo Corporation through a debt-for-equity swap. By the late 2010s the mine was producing around forty thousand tonnes of refined nickel and roughly thirty-six hundred to four thousand tonnes of cobalt a year — approaching but not always reaching its design capacity — until the COVID-19 pandemic forced a suspension of production in 2020.

For Madagascar, one of the poorest countries in the world, Ambatovy's weight is hard to overstate. During construction between 2006 and 2012 it accounted for about 35 percent of all foreign direct investment in the country. It has generated roughly a third of Madagascar's foreign exchange earnings and provided around a quarter of its tax revenues. The mine employs about ten thousand people, some eight thousand of them Malagasy, and in 2022 it paid the government around 44 million US dollars in mining taxes and fees while spending hundreds of millions more with local suppliers. After years of running at a loss, it turned profitable in 2021 as nickel prices climbed.

All of that came out of a rainforest. The mine and its pipeline have destroyed or heavily degraded roughly two thousand hectares of primary forest in a zone of exceptional endemism, where botanists count well over a thousand plant species and more than two hundred vertebrates, among them around thirteen species of lemur. Local residents and outside researchers have linked the operation to air and water pollution and a heightened risk of landslides. This is the unavoidable arithmetic of the place: the metals that power the country's economy, and increasingly the world's batteries, came from clearing forest that took millions of years to evolve and cannot simply be replanted.

Ambatovy became a closely watched test of an idea called biodiversity offsetting, the promise that a company can compensate for the forest it destroys by protecting forest somewhere else. The project established four offset areas covering nearly twenty-nine thousand hectares, and a 2022 study found these offsets were on track to achieve no net loss of forest cover, a genuinely unusual result. But the verdict is not clean. Researchers cautioned there was not enough data to know how the offsets affected wildlife rather than just tree cover, and earlier work found that the protected zones cut impoverished communities off from forest resources they had long depended on. Whether Ambatovy proves that mining and conservation can coexist, or only that the accounting can be made to balance, remains genuinely unresolved.

The dilemma at Ambatovy is not only Madagascar's. Nickel and cobalt are core ingredients of the rechargeable batteries that run electric cars, phones, and the broader shift away from fossil fuels, and global demand for both has surged. That is why the mine swung from years of losses into profit when nickel prices spiked, and why a remote corner of the eastern rainforest is wired into the world economy. The uncomfortable truth is that the metals meant to power a cleaner future are themselves dug from places of extraordinary natural richness. Ambatovy sits squarely on that contradiction, a single mine carrying the weight of a much larger question about what the energy transition costs and who pays it.