Eating dinner with conservation biologists was like walking through a minefield of ethical decisions: grasslands have been overgrazed by steer raised for beef, and all cattle emit greenhouse gases though enteric fermentation; the poop from industrially raised chickens poisons the Chesapeake; the Amazon has been slashed and burned for soy--and don't even mention seafood. To this bunch of herpetologists, the sin of ordering shrimp lay in the bycatch--young fish, and especially sea turtles, caught in the nets and discarded, dead or dying.