Companies with large fleets, such as UPS, Walmart, and Staples, are investing in hybrid vehicles as a means of reducing their fuel needs. They are also reassessing their route logistics to decrease the number of miles traveled per unit of product delivered. These measures not only conserve fossil fuels and prevent air pollution, but also save money. For example, between 2007 and 2012, Walmart increased its fleet efficiency such that it delivered 658 more cases, but traveled 298 million fewer miles You can imagine the tremendous fuel savings that occurred as a result.