Paper towels or hand dryers?

I've never known for sure which is better.

Hand dryers produce less waste, but unless they're very powerful, they don't really dry your hands. I'd always rather have paper towels in a public restroom.

Here's a discussion on the topic by Dr. Ben Chapman, an assistant professor and food safety extension specialist at N.C. State University.

http://barfblog.foodsafety.ksu.edu/blog/152430/12/01/09/hand-dryers-might-be-better-environment-worse-limiting-disease-spread