What Dietz said echoed one of the findings of EACH-FOR: that decisions to migrate from areas under environmental stress are often caused by an accumulation of small crises.

• EACH- FOR的研究发现中有一点与迪茨所说的话相呼应。那就是，从环境压力大的地区移居的决定常常是由一系列小规模危机所导致的。