Do you desire privacy or a little extra security "fencing"? Growing a hedge could be your solution.
Generally, evergreen and deciduous shrubs are used but the possibilities are pretty endless to create a "living wall". By planting the correct varieties you can have a fast growing, low maintenance, hardy hedge in no time.
*formative pruning: the process of shaping a tree when it is young*
Note: Do not trim conifer hedges after August it can encourage bare patches to develop.