21.   Anthrax spores can survive for years in a hostile environment such as a desert before coming to life upon contact with moist tissue such as the lungs.

22.   As a result, we too often get the idea that these notable ruins were solitary refuges of habitation in a hostile environment, lone castles in a wilderness.

23.   As Madeline and Edward deal with old wounds and new lovers, James has to adjust to a hostile rural environment.

24.   At best, our houses become hostile environments.

25.   At around that time Paranthropus, presumably unable to survive a more hostile environment, died out, leaving the field to Homo erectus.

26.   At the first campus, a tardy student was punished in a hostile environment.

27.   Black workers who filed the California suit said they failed to get their share of promotions and often worked in a hostile working environment that included racial slurs.

28.   A hostile environment claim required the plaintiff to show that his work environment was so pervaded by racial harassment as to alter the terms and conditions of his employment.

29.   --A gradual increase in sales across the tech spectrum as customers upgrade hardware and software systems to accommodate the needs of a more hostile environment.

30.   A meme does the same, struggling to reproduce itself in the often hostile environment of human culture.