The goal of the Clean Air Act’s visibility program is to achieve natural visibility conditions by 2064 in federal Class I areas (basically, national parks). States must show that they are making ...

MADISON, Wis. (AP) — A year ago, federal environmental regulators told West Virginia officials that their plan to clear sulfur and smog from skies over the state’s national wilderness areas wasn’t ...

The United States Environmental Protection Agency (“EPA”) published a March 16th Federal Register Notice proposing to approve a revision to the Arkansas State Implementation Plan (“SIP”) submitted by ...

The Trump administration is working to ease requirements for states to curb emissions that harm visibility in national parks ...

HARRISBURG, Pa. — It’s time for another Weather Rewind, where we look back at this week’s most impressive weather! This week, wildfire smoke returned from eastern Canada. It brought unhealthy ...

Strong state regional haze plans are critical to restoring clean air and clear skies for treasured places like Carlsbad Caverns, Guadalupe Mountains and Big Bend National Parks, and Caney Creek ...

Visibility plays a huge role in how we experience the weather, and it’s an important factor in staying safe on the road, in the air, and even on foot. When meteorologists talk about visibility, we’re ...

Do you notice a haze to the sky or perhaps smell a little bit of smoke in the air outside? Believe it or not, smoke from wildfires over the western part of the United States and even Canada is ...

If it’s not one thing, it’s another. The heat is behind us for now, but with the shift in the upper-level pattern, Western U.S. and Canadian wildfire smoke is getting dumped into the middle of the ...

Strong state regional haze plans are critical to restoring clean air and clear skies to treasured places like Grand Canyon, Sequoia and Kings Canyon, Hawaii Volcanoes and Yosemite National Parks.