Considering social costs means that in deciding whether to build a factory the effects on the environment must be taken into account as well as the number of jobs that may be created. Figured this way, some money-winners may turn out to be losers.
考慮「社會成本」，在面對建廠事件時，就不能只算工廠可增加多少工作機會、創造多少財富；還得預估會為環境帶來的影響。