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Story summary
- S&P Global forecasts copper demand will rise about 50% by 2040, driven by artificial intelligence (AI) and defense.
- Demand is expected to reach 42 million metric tons, while supply could fall short by over 10 million metric tons.
- The AI data-center boom and greater defense spending due to geopolitical tensions are key factors.
- Experts call for policy and investment to address supply challenges and secure copper's role in future infrastructure.
