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Discovery

Acid Rain: Scourge of the Past or Trend of the Present?

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Photo of a stream with boulders in the streambed.

Has acid rain washed out of forests and streams? Or is a new threat on the way?

Credit: NSF Hubbard Brook LTER Site


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Photo of a northeastern lake with forest in the background and birch trees in the foreground.

Northeastern lakes were once a witches' brew of acidifying waters that killed fish and birds.

Credit: NSF Hubbard Brook LTER Site


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Photo showing fallen leaves on the ground.

Will sugar maples turn red in fall? Climate change and acidification of soils may tell the tale.

Credit: NSF Hubbard Brook LTER Site


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Photo showing equipment at NSF's Hubbard Brook LTER Site that monitor rainwater chemistry.

Meteorological and precipitation chemistry monitoring at NSF's Hubbard Brook LTER Site.

Credit: NSF Hubbard Brook LTER Site


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Photo of a scientist collecting a stream sample at the Hubbard Brook LTER Site.

A scientist collects a stream sample at the Hubbard Brook LTER Site.

Credit: NSF Hubbard Brook LTER Site


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Photo of a gauging station at Hubbard Brook.

A gauging station at Hubbard Brook provides new data on acidification of streams.

Credit: NSF Hubbard Brook LTER Site


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