Should the extra “global warming” tax be $0.05 a gallon, $0.50 a gallon, or $1.50 a gallon? Our views will change as we learn more, but at the moment the size of the tax hinges on a question of moral philosophy: how much do we believe we owe our distant descendents?
但这样的税收必须是恰当的。一辆在城市里行驶十英里的SUV会燃烧一加仑的汽油并向空气中排放约三公克的碳。那么额外的“全球变暖”税到底应该是0.05美金、0.5美金还是1.5美金一加仑呢？我们的观点会随着我们认知的加深而变化，但现在该税收的额度是基于一个道德问题：我们自认为究竟亏欠我们的子孙后代多少钱呢？