There's a message with the music at Green Apple Festival

"For former Grateful Dead drummer Mickey Hart, his next gig is just a trip back in time.

"In the '60s, music festivals were all about coming together to celebrate and spread the word about what people were feeling," he says. "Then it was about the (Vietnam) war and a cultural revolution. This time, it's about saving the planet."

This Sunday, Hart co-stars with a legion of top talent in the multi-city Green Apple Festival. It's a harbinger of summer music fests that place as much of a spotlight on green awareness as on their sonic offerings.

Green Apple started in 2006. This year, eight cities will host a range of acts in a variety of public settings."

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