Are free newspapers destined for the dustbin of history?

London is getting sick of the enormous amount of litter generated by the 2 newest free newspapers available every day on our streets, according to MediaGuardian. I don't travel by tube train myself, but have heard from friends how they find themselves wading through a dirty carpet of newprint . . ironic though, that in this time of anxiety over the future of paid for newspapers, due to migration of advertising money - and changing reader habits, that free papers should come unstuck by their very physicality . . .