Chris Martin has admitted that there is still “a long way to go” to make touring entirely environmentally friendly. However, he says, with the plans Coldplay have put in place for their world tour next year, they have been able to make their live shows more sustainable in ways the band “didn’t dream were possible”.Speaking to Ken Bruce on BBC Radio 2, Martin said: “We’ve been working with some amazing brains to see how we can cut down as much of the environmental impact as possible.