21.   He might make his biggest impact as a returner.

22.   He remembers feeling the impact as the plane hit the second tower, the sky outside his window turning black, the walk through a neighborhood in ruin.

23.   He says the schools will be designed and built to have as little impact as possible on the natural environment.

24.   His impact as a pass rusher and kickoff returner will be a must for a defensive unit that replaces seven starters.

25.   Howard had explanations for his failure to make an impact as a receiver in a five-year NFL career.

26.   I am fighting a losing battle here in newspaperland against using impact as a verb.

27.   If the fungus is found in Colombian varieties of coca, Colombian scientists would go on to evaluate its effectiveness, safety and environmental impact as an herbicide.

28.   In a value-to-a-team context, there are few players in the league who can make as big an impact as Kasparaitis.

29.   Instead, he went about his own business of trying to make an impact as a freshman and succeeding in the classroom.

30.   It is strange how two tragic events that are as far apart in time and impact as the Vietnam War and the explosion in Oklahoma City could come together.