Graham Harvey explores a path well trodden by the likes of Michael Pollan, Peter Singer and Felicity Lawrence who have all described the current industrial food system in some detail. However, where this book differentiates itself is in its development of a solution for rising carbon emissions, poor health and food security; he argues we already have the answer - grass - good quality, grazeable pasture. And he maintains that the effective "art and science of an efficient grazing system" would not only support all Britain's livestock requirements but through the beneficial effects of nitrogen fixing clovers, added soil fertility would permit occasional ploughing and planting to vegetables or grains. He argues that if we avoid corporate agribusiness and industrial farming, Britain could soon find itself self-sufficient in food, with the grasslands acting like a giant, rolling, green buffer zone to international food price shocks. And, by sequestering atmospheric carbon, they could even help mitigate the effects of climate change.