They would be the first birds to fly there.
Answer:"chemicals"
-and-
"disease"
-and-
"obesity"
Explanation:Negative connotation refers to a bad feeling that we experience when we hear a certain word or phrase .
Provided that this writer wants people to actual dislike and dissociate themselves from conventional grown foods these words adds to that as they will give people a bad feeling about such foods.
If this is how you've presented the question, Its a bit hard to answer it when one hasn't read these books. It'd be best if you'd put both books into a summary for us to go based off of, at most.