From Bryn Glover, Kirkby Malzeard, North Yorkshire, UK
I would like to thank you for your decision to give space to Mayor of London Sadiq Khan and the London Ultra Low Emission Zone. Though everyone claims to be in favour of ending harmful emissions, when it comes to the point of actually doing something, enthusiasm rapidly fades and self-interest takes over. Khan is facing increasingly vicious opposition to his objectives and what he is attempting needs great courage. It is heartening and greatly encouraging that New Scientist has given him this support (17 June, p 21).
