John Waldman, “Running Silver: Restoring Atlantic Rivers and Their Great Fish Migrations” (Lyons Press, 2013)

When it comes to understanding why our planet’s biodiversity is declining so precipitously, no phrase has as much explanatory power as “shifting baselines”  — as essayist Derrick Jensen put it, “[T]he process of becoming accustomed to, and accepting as normal, worsening conditions.” Every generation regards its own environment as natural...

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