For almost 100 years, the northern Ontario community of Sudbury was devastated by sulfur dioxide and metals from smelting nickel ore. But 40 years ago scientists, citizens, governments and mining companies set out to fix the damage. City- and industry-led programs planted 12 million trees, restored 3,400 hectares of land and 330 lakes, and the air is now clean. As global demand for nickel, cobalt and copper grows to support production of electric vehicles, Sudbury offers a model for how we can move to smarter industrial processes that protect the environment, wean us off fossil fuels and build community resilience in the face of climate change.       

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