Find out more here:
http://springofsustainability.com/
A wide range of speakers with a wide range of viewpoints. You can pick and choose which ones appeal to your particular perspective. Activists, businesspeople, scientists, various forms of spirituality...it runs the gamut.
This is what they advertise:
The World’s Largest Online Earth Day Celebration
ALL DAY on April 22, 2014, 8:00am – 8:00pm Pacific
followed by a FREE 9-Week Action Program