PayScale put together a list of 319 college majors ranked by the percentage of graduates in each major who answered "yes" to a question about whether they feel like their job makes the world a better place. Here are the top 10 by major and % high meaning.

• Medical Laboratory Science (97%)
• Pastoral Ministry (91%)
• Clinical Laboratory Science (84%)
• Community Health Education (84%)
• Respiratory Care (84%)
• Nursing (83%)
• Dental Hygiene (82%)
• Counseling (81%)
• Diagnostic Medical Sonography (81%)
• Early Childhood & Elementary Education (81%)

Source: PayScale