The California region where residents face growing health risk

One of America's richest farming hubs is facing a hidden threat that could jeopardize the health of local residents and the future existence of the land.

's Central Valley and its neighboring drylands grow a third of the country's crops and power a multibillion-dollar economy.

But scientists say the region is now confronting the escalating danger of dust storms driven by , unchecked development, and vast swaths of idle farmland.

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