Money may not buy happiness, but some college majors could help you land a job in a very satisfying industry.

In a recent survey, PayScale asked respondents if they felt their jobs made the world a better place. They then ranked more than 300 college majors based on the percentage of graduates in each major that answered "yes." The majority of the top-ranked majors are in the health care industry:

Most meaningful college majors, mid-career pay

14T. Radiologic technology, $63,800

14T. Mining engineering, $109,000

14T. Therapeutic recreation, $48,000

11T. Respiratory therapy, $62,300

11T. Athletic training, $48,300

8T. Early childhood and elementary education, $42,300

8T. Diagnostic medical sonography, $70,800

8T. Counseling, $40,900

7. Dental hygiene, $72,800

6. Nursing, $73,600

3T. Respiratory care, $64,000

3T. Community health education, $56,500

3T. Clinical laboratory science, $60,100

2. Pastoral Ministry, $49,600

1. Medical laboratory science, $61,500

Click here to see PayScale's ranking and analysis.