From Mike Meech, Clacton-on-Sea, Essex, UK
Graham Lawton says wood is a carbon-neutral biofuel so long as trees are replanted (16 March, p 33). But Michael Le Page reports the European Union being sued for making global warming worse by burning wood (9 March, p 9). He notes that wood burning might seem an appealing alternative to fossil fuels, but it produces more carbon dioxide than coal per unit of energy.
