USA Today: Drury University junior Garret Shelenhamer ditched his car and gets to his classes and volunteer commitments using a shiny, new bike provided by the school. Shelenhamer, 20, is one of a number of students across the USA taking advantage of free or low-cost bike sharing programs, which have become increasingly popular. Drury students agreed to pay a $20-a-year sustainability fee, which funds the bike program. The Springfield, Mo., school purchased 40 new bikes for use by students in …