From Iain Climie, Whitchurch, Hampshire, UK
I am not sure that a longevity diet is so clever, given that those most likely to benefit will have well-off Western lifestyles, so living longer will worsen their environmental impact (2 July, p 38). Should we take up smoking and dangerous sports on retirement to compensate?
A far more pressing requirement is to ensure the food security of lower-income countries and to find ways of rehoming climate refugees. With India at risk of becoming largely uninhabitable, who will house a billion people or more?
