Joan Chamberlin of the Astronomical Society of Northern New England loves astronomy outreach and travelling so much that she combined the two. Last we tracked her down, she'd gone to Kathmandu, Nepal, to do astronomy outreach. She did a well-received presentation on light pollution with Globe at Night and NASA Night Sky Network resources. One group of motorcyclists loved the presentation so much that they put the NASA stickers that Joan gave them on their motorcycles!
All our clubs give presentations in their communities, so check with your club to see if they'll do a presentation for your group. We can't promise they'll go global, but you never know!
Want to find out more about preventing light pollution? Check the International Dark Sky Association's webpage.