Despite its potential to battle disease and hunger, genetically engineered food is still controversial

Last week, scientists from the University of Edinburgh’s Roslin Institute announced they had deleted the section of DNA that leaves pigs vulnerable to porcine reproductive and respiratory syndrome, which is estimated to cost European farmers £1.5bn a year in loss of livestock and decreased productivity. Genetically modified animals are banned from the EU food chain, but since this is a new and different technique it’s possible they’ll be appearing in bacon sandwiches in a few years.

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