Volunteers track Parisian pollution with the help of tree bark

Along the streets of Paris, more than 40,000 tall, leafy plane trees provide picturesque backdrops, offer shade to city dwellers, and improve air quality, among numerous other benefits. Since 2016, some of these trees have ...

Wildfire smoke may harm in a number of ways

Spring and summer in the U.S. now come with a new normal: days and even weeks where the acrid overhang of wildfire smoke forces us indoors. At its worst, not even shuttered windows can protect us from its effects—the stinging ...

Bringing environmental justice to disadvantaged communities

Not all communities in the United States face the same risks for environmental problems such as air pollution, noise and wastewater. But how can federal agencies fairly identify which areas deserve the most help?

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