为啥美股还要涨？财政部长耶伦表示，到2050年，每年需要3万亿美元，才能过渡到低碳经济。总计78万亿美元，是当前国家债务的两倍多。Yellen says $3 trillion needed annually for climate financing, far more than current level. That's a total of $78 Trillion, more than double the current national debt.