Humans already appropriate 30 to 40% of all photosynthetically fixed carbon worldwide, indicating that expansion of additional biomass harvesting is likely to stress ecosystems, in some cases precipitating collapse and extinction of animal species that have been deprived of vital food sources.
人类在世界范围内已经占用了光合作用固定碳的30%到40%，这预示着额外生物量的收获很可能会给生态系统带来压力，在一些情况下会夺走某些物种的食物来源，从而导致生物物种的急剧下降乃至灭亡。