What does the phrase in contempt in the definition of youngster refer to

Contempt:
1.The feeling with which a person regards anything considered mean, vile,or  worthless; disdain; scorn.2.The state of being despised; dishonor; disgrace.3.Law.Youngster: 
1.Child.2.A young person.3.A young horse or other animal.4.(in the British navy) a midshipman of less than four years' standing.5.(in the U.S. Naval Academy) a midshipman in the second year.

He discusses the problem of human destruction of nature and gives solution to prevent it.

Not sure brra