<style face="normal" font="default" size="100%">Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems</style>

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<style face="normal" font="default" size="100%">Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems</style>

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<style face="normal" font="default" size="100%">Who needs environmental monitoring?</style>

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<style face="normal" font="default" size="100%">An assessment of recovery and key processes affecting the response of surface waters to reduced levels of acid precipitation in the Adirondack and Catskill Mountains</style>

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<style face="normal" font="default" size="100%">Catchment-scale variation in the nitrate concentration of groundwater seeps in the Catskill Mountains, New York, U.S.A</style>

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<style face="normal" font="default" size="100%">Controls of stream chemistry and fish populations in the Neversink watershed, Catskill Mountains, New York</style>

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<style face="normal" font="default" size="100%">Soil calcium status and the response of stream chemistry to declining acid rain</style>

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<style face="normal" font="default" size="100%">The experimental watershed liming study: comparison of lake and watershed neutralization strategies</style>