Readers reply: how big would Britain have to be for all its meat, milk and eggs to be ethically farmed?

The long-running series in which readers answer other readers' questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsHow big would Britain have to be for all the meat, milk and eggs we consume to be ethically farmed and free range?Michael Ryan, BodelwyddanSend new questions (with subject: "N&Q") to nq@theguardian.com. Continue reading...