Recent research by two Canadian psychologists found that people who spent money on green products were, immediately afterwards, less likely to be generous and more likely to steal than those who bought non-green stuff. Apparently doing something virtuous – like turning off the lights– makes us feel entitled to act badly afterwards.
而且，上述估计还是建立在及其乐观的假设之上的，就是假设人们在参与活动之后不会增加能源使用量。两位加拿大心理学家最近的研究发现，消费者在购买绿色产品后，其做出慷慨行为的几率会立即下降，偷东西的几率反倒会上升。显然，做好事（比如关灯一小时）会让我们下意识觉得自己获得了做点小坏事的权利。