Ecological markers suggest that in the early 196os, humans were using about 70 per cent of nature's yearly output; by the early 198os, we'd reached ioo per cent; and in 1999, we were at 125 per cent.b' Such numbers may be imprecise, but their trend is clear - they mark the road to bankruptcy.
Either this is not cited properly, or I do not understand how the citation is implying this
