Independent (UK): Imagine U2 clambering on to a train to take them to a sold-out stadium; Keith Richards swigging from a bottle of organic, Fairtrade booze while Bon Jovi recycle their post-gig waste. Unlikely as it sounds, it may yet come to pass as rock’n’roll’s tradition of painting the town red fades to an ethical shade of green. Polluting private jets, excessive dressing room demands and arena-busting tours are no long sustainable, according to the biggest study so far on the effect of the live …