In the past, the government encouraged farmers to develop a deer-herding industry. Not long after this, the animals were overbred, their market value dropped, and they were let loose in many different locations. Green Island is the best example to date.
過去政府曾鼓勵農民發展養鹿農業，不久繁殖過剩，價格滑落，被四處野放，今天綠島是最好的例子。