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Steel Giant ArcelorMittal is making the transition from coal to green hydrogen, saving millions of tons of CO2 each year.       Over 1.8 billion tons of steel are produced annually worldwide, releasing nearly double that in carbon dioxide into the atmosphere. As a result, the industry accounts for 7% to 8% of global carbon emissions per year. But the world can’t get by without this ever-present metal anymore. Hence, it’s a key target in the race to net-zero by 2050. The problem with steelmaking is that about 75% of the energy used to make it comes from coal. For example,...

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