The global push for clean energy is creating an environmental paradox. While nickel is essential for electric vehicle batteries and stainless steel, the mining required to obtain it often destroys the very ecosystems the world is trying to protect.
The Cost of Battery Metals
A new study published in Nature Ecology & Evolution reveals a stark trade-off between sourcing nickel and preserving biodiversity. Researchers from the University of Queensland (UQ) conducted over 500 mine-by-mine simulations extending to 2050 to analyze this collision.
Dr. Jayden Hyman, an environmental engineer at UQ’s School of the Environment, led the research. The team layered known nickel deposits against maps of carbon storage and biodiversity to determine the impact of various demand scenarios and conservation restrictions.
Nickel is found in two primary forms: sulfide deposits, located deep underground in regions like Canada, Australia, and Russia, and nickel laterites. Laterites are soft, weathered rocks found just beneath the surface in tropical regions and are expected to supply between 78 and 83 percent of the world’s nickel through 2050.
Indonesia’s Dominance and Market Shifts
In just one decade, Indonesia has transitioned from a minor producer to providing more than half of the global nickel supply. Projections suggest the country could supply 74 percent of the world’s nickel by 2040.
This rapid growth, supported by Chinese-financed smelters on the coastlines of Halmahera and Sulawesi, has significantly lowered global prices. Higher-cost operations elsewhere have struggled, leading several Australian nickel mines to close in 2024.
Biodiversity and Coastal Risks
The environmental stakes are high. The study found that half of all nickel mined between now and 2050 will come from land areas ranked in the top 10 percent for importance in maintaining carbon stocks, plants, and animals.
Protecting this top 10 percent of priority land could result in a supply drop of roughly 47 million tons, potentially creating a shortfall of up to 18 percent of demand by 2050.
The threat extends to the ocean. Approximately 170 million tons of known nickel are located within 31 miles of a coastline. Between 53 and 60 percent of future mining could occur upstream of high-priority coastal waters, including the Coral Triangle between Papua New Guinea, the Philippines, and Indonesia.
The Deep-Sea Dilemma
One proposed alternative is seafloor mining in the Pacific’s Clarion-Clipperton Zone. This area contains polymetallic nodules rich in manganese, cobalt, and nickel, with an estimated 274 million tons of nickel—roughly equal to all identified land deposits combined.
However, conservation groups and various countries are calling for a moratorium due to the poorly mapped seafloor ecosystem. These habitats include thousands of crustacean and worm species that may take decades to recover from disturbance.
Dr. Hyman’s modeling suggests a complex trade-off: a 10-year moratorium on deep-sea mining could redirect pressure back to land, potentially pushing an additional 17 million tons of laterite mining into tropical forests and 6 million tons into sulfide deposits.
Looking Ahead
The study emphasizes that the decisions made over the next five years will define the environmental cost of the clean energy decade. Dr. Hyman argues that several systemic changes must occur simultaneously to mitigate these risks.
Proposed solutions include the implementation of stronger sustainability rules for supply chains and increased transparency regarding the origin of nickel in batteries. The study calls for real investment in recycling to reduce the reliance on new mining.
Frequently Asked Questions
What are nickel laterites and why are they problematic?
Nickel laterites are soft, weathered rocks found just beneath the surface in tropical areas. Mining them requires progressive clear-cutting of forests to expose the ore, which destroys wildlife habitats and releases stored carbon.
How does nickel mining affect the ocean?
Mining on stripped hillsides can mobilize heavy metals and sediment, which rain then carries downstream into nearshore reef systems. This is a particular risk in the Coral Triangle, one of Earth’s richest marine ecosystems.
What is the Clarion-Clipperton Zone?
It is a large stretch of the Pacific seafloor containing polymetallic nodules. These nodules hold an estimated 274 million tons of nickel, offering an alternative to land-based mining, though the economic viability and environmental impact remain uncertain.
Do you believe the risk to biodiversity is a necessary price to pay for the transition to electric vehicles?
