Thanks. I did think “more efficient than what?”, but none of the possibilities I came up with other than “than they are at producing other foodstuffs” seemed relevant in context. (I don’t even remember what they were.)
Thanks. I did think “more efficient than what?”, but none of the possibilities I came up with other than “than they are at producing other foodstuffs” seemed relevant in context. (I don’t even remember what they were.)