To be frank, it sounds like you are passing up a good opportunity because of a misunderstanding about evidence-based public health techniques.
Go buy a basic public health textbook to read while you're bored at your desk, and read about why environmental strategies are a million times more effective than telling kids one by one to stop eating too many Twinkies. (Or why it's a zillion times more effective to install GFC outlets in bathrooms than to tell people one by one not to blow dry their hair near the sink. Or why it's more effective to install airbags than it is to tell people one by one to stop driving fast......)
It will stave off your boredom for a while and open your mind to new options.
I completely agree with you... and am well aware of how behavior can be influenced by environment (I am, after all, an urban planner with a particular interest in environmental psychology). But my point is that, while I may value such work being done, I personally would find volunteering more fulfilling if it were hands-on and involved human interaction. I don't need to spend MORE time behind my desk.