folks outside of the environmental bubble, his sister sends us this flier i the mail and says, "bonnie raitts effort, a nonprofit called green highway, was a pioneer of the concept of connecting concert-goers to causes. >> i picked up the phone and called her manager, kathy kane. her manager actually comes from an activist background with greenpeace, as well, and said, "yeah, i'll lend you all of the gear. you can take it out. we'll mentor you. we've got a non-profit." and i quit my job, and we took all of that mentorship and gear from bonnie raitt's green highway and brought it outn the road, and it's evolved into reverb. >> reporter: the early days were spent on tour with acts including alanis morissette and john mayer, maroon 5 and the daveatthews band, with reverb customizing tents and booths for the audience based on the interests of each act and its fan base. for the bands themselves, reverb would provide access to bio-diesel for ur buses, along with backstage recycling and composting. on this day, gardner is showing me around at forest hills. >> so, we've been working with forest hill