Air pollution costs the global economy more than $5 trillion annually in welfare costs, with the most serious damage occurring in the developing world.

就福利成本而言，空气污染每年给全球带来的经济损失超过 5 万亿美元，而对发展中国家的损害是最为严重的。

We looked at it based on welfare costs and that number is just staggering -- it's 4.6 trillion dollars a year.

我们根据福利成本来审视它，这个数字令人震惊——每年 4.6 万亿美元。

And even free-market champion Milton Friedman endorsed the negative income tax, similar to basic income, as a way to reduce welfare costs and bureaucracy.

甚至自由市场的拥护者米尔顿弗里德曼也支持负所得税，类似于基本收入， 作为减少福利成本和官僚主义的一种方式。