Andrew Balmford's moment of discovery, which he shared with Professor
Rhys Green, was the realization that the best way to conserve wild
nature would almost certainly be to keep large areas of high-yielding
agriculture completely separate from large areas of land completely
committed to biodiversity conservation. This is known as land-sparing, in contrast to the alternative strategy of doing agriculture and
conservation in more or less the same spatial area - land-sharing.