Methane-emitting cows and junk motorway food | Letters

Calls for a tax on meat and dairy products (Report, 8 November) are misguided and would increase, not decrease, overall emissions from agriculture. Instead we should improve production systems by taxing nitrogen fertiliser and pesticides, the underlying causes of environmental damage associated with food systems.Something close to mass hysteria has developed in relation to cattle and other ruminants since the publication in 2006 of Livestock’s Long Shadow, by the Food and Agriculture