Snow in the global environment is altered by human activity in many ways, some intentional and others inadvertent. Among the deliberate changes made to snowpacks are blowing snow management to benefit agriculture and transportation, forest management to protect and enhance water yields from snowpacks, urban snow management to improve transportation and habitation in developed areas, albedo modification to enhance snowmelt rates, and ski area management for enhanced and safe recreational opportunities. The major inadvertent change that may impact snowpacks is the possibility of global warming being forecast for the next century. This final chapter generally discusses these human-snow interactions from the viewpoint of the snow hydrologist.