The "green" trend in Hollywood is nothing new -- in fact the Environmental Media Association just turned 20! Read on to see which stars are committed to the cause -- plus, find out how to get involved.

Honoree Sir Richard Branson pledged to use profits from his Virgin airlines to invest in developing clean fuels and renewable energy, while singer Jason Mraz was honored for his commitment to green touring by using sustainable textiles. Harrison Ford and Calista Flockhart were on hand as presenters, while other stars such as Simon Baker, Blythe Danner, Daryl Hannah, Amy Smart, Ginnifer Goodwin and Chevy Chase were in attendance as Cedric the Entertainer performed the evening's master of ceremonies duties.

Founded by Norman and Lyn Lear with Alan and Cindy Horn, the EMA encourages Hollywood to spread the word about going green.

The event itself -- held Sunday on the Paramount lot in Hollywood -- aimed to set the standard for green events. As the trend continues to make award shows and other gatherings more environmentally conscious, the EMA took it to the max by serving only local, organic food, using minimal electricity and eliminating waste with on-site composting.

To find out how you can get involved, dial up www.ema-online.org.