Even so, one can argue that current estimates of wealth are biased. As for natural capital, the World Bank has so far limited itself to the atmosphere as a sink for carbon dioxide, oil, and natural gas, and forests as sources of timber.
我们尚处在对可持续发展量化研究的早期。即便如此，有人也可以驳斥说目前对财富的估测失之偏颇。就自然资本而言，世界银行直到目前为止还将其限定为吸纳二氧化碳的大气、石油、天然气和提供木材的森林。