Adam Richins looked outside and saw a brownish hue spanning the horizon across Millard County. “It’s a dust bowl,” he said.

Addressing a problem first identified 50 years ago, federal regulators say stricter new rules to limit miners' exposure to silica dust are expected to finally go on the books on Tuesday.

Silica dust exposure limit sigh of relief for coal miners 02:33. PETERS TOWNSHIP (KDKA) — Coal miners can breathe a small sigh of relief with the new federal rule that cuts their exposure to ...

This summer, the federal Mine Safety and Health Administration issued a proposed new regulation to limit miners' silica dust exposure after decades of concern over the dust's role in black lung ...

Mine operators will be mandated to use engineering controls to prevent exposure to silica dust, the rule says. Operators will use dust samplings and environmental evaluations to monitor exposures.

But, to pull off those kinds of numbers, humans would need to mine roughly 11 million tons of moon dust to create a proper and effective moon dust shield, the researchers estimate in their findings.

It's caused by the inhalation of coal mine dust, especially exposure to highly dangerous silica dust. Silica is one of Earth's most abundant minerals, and it's about 20 times more toxic than coal ...