How do you keep up on current happenings? Seems most organizations have a Facebook page these days. Some are better at posting than others, but all indicate how recently and include information "About" the group. Be sure and "Like" any for which you want ongoing updates. Here are just a few good, local orgs including us!
Pikes Peak Green Team
Energy Resource Center
Colorado Springs Utilities
Pikes Peak Urban Gardens
Pikes Peak Community Foundation