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Arizona leaders are encouraged by the U.S. Environmental Protection Agency's new soot standards they said will protect people from dangerous and deadly particle pollution. Sandy Bahr, director of the Grand Canyon chapter of the Sierra Club, said the revised standards will help reduce harmful pollution and improve air quality by lowering the standard for fine particulate matter 2.5 microns or smaller in diameter, known as PM 2.5, from 12 micrograms per cubic meter to nine micrograms per cubic meter. ...

Voters from Arizona and across the West say a public official's position on conservation will be an important factor when deciding who to support in the upcoming election. Colorado College's most recent Conservation in the West Poll shows 81% of voters in the Grand Canyon State support 30x30 conservation goals, which would translate to protecting 30% of lands and oceans by 2030. Lori Weigel, a pollster with New Bridge Strategy, said while last year Arizona voters expressed concern over the Colorado River, this year's poll didn't include specific questions about the vital waterway. ...

Nevada conservationists held a webinar to discuss the protection of Ash Meadows National Wildlife Refuge near the Nevada-California border from proposed mining activities. Mason Voehl, executive director of the Amargosa Conservancy, said the refuge is the largest remaining oasis in the Mojave Desert and is home to at least 26 endemic species. Voehl added that because Ash Meadows is entirely sustained by groundwater, its future depends on how that groundwater is managed in the basin. ...

North Carolina is taking action to address environmental injustice, specifically targeting areas disproportionately affected by pollution and climate change. Gov. Roy Cooper signed Executive Order 292 to establish an Environmental Justice Advisory Council, made up of 11 people from state agencies and 11 appointed by the governor. ...

Trees in urban areas provide benefits for people, including decreased temperatures and improved air quality, according to new research from Washington state. The Greening Research in Tacoma initiative measured air temperatures across a neighborhood in the city to understand the effects of urban trees. Ailene Ettinger, qualitative ecologist for The Nature Conservancy in Washington and the study's lead author, said temperatures were as much as 18 degrees lower in areas with trees. ...