Sat. May 26

 We're writing this on Earth Day, April 20. We're headed out shortly to take in the Atlantic Ocean - it's still there, right? - and breathe in the fresh air - that's there too, isn't it? And we'll be recycling as always. But the 14th annual EarthFest concert happens May 26 at the Hatch Shell on the Esplanade. It's headlined by the trio from Tufts, Guster, who have made environmenalism a key point of their program. That is, they're not just showboating. Also: the lovely and seductive songstress KT Tunstall (in photo)  Mat Kearney, John Butler Trio, Vega4 and Grace Potter and the Nocturnals. The free event is expected to draw 100,000 people. Naturally, there's all sorts of Earth Day-ish ancillary adventures - Kid's Planet (an interactive family area) with songs from Girl Authority and SteveSongs. (That starts at 10 a.m.) The sponsoring station, WBOS says that the station and the EarthFest will be "carbon neutral" meaning the station is purchasing carbon credits to offset energy output and neutralize the effect of greenhouse gas emissions. This should be a feelgood day all around. The concert starts at 11:30 a.m. And, of course, the idea is to take this environmentalism with you and apply it daily. You may not be Al Gore, but you can be Mike Dukakis. The former governor and Presidential candidate can be seen walking along Muddy River in Brookline gathering trash for recylcing. It's not an urban myth. We saw him and talked to him for a while when were were walking - not taking our car - to a Red Sox game a couple of years back.

Storrow Drive, earthfest.com