Four Fish starts with Greenberg's own tale of how he became an amateur fisherman as a kid. Using his own knowledge of the waters he trolled from boyhood on — and how they changed over the decades — he eases the reader in the tale of radically changed fish populations and the reasons we face fishery collapses around the globe.
Greenberg explores each of the four fish – salmon, tuna, bass, cod – in depth. Greenberg explores how each fish population got into the precarious state it's currently in, the unique challenges each population faces in terms of recovery, and what our options are. Is it figuring out a way to "farm" salmon sustainably? A moratorium on blue fin tuna? Unlike so much of the polemical work on the subject, Greenberg takes a very broad view of these fish, with historical, commercial, recreational, and environmental factors all getting their due.
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