Attempts to quantify Earth's human carrying capacity or a sustainable human population size face the challenge of understanding the constraints imposed by nature, the choices faced by people and the interactions between them.
Attempts to quantify Earth's human carrying capacity or a sustainable human population size face the challenge of understanding the constraints imposed by nature, the choices faced by people and the interactions between them.
将地球的人口承载能力或具有永续力的人口规模量化的尝试，面临的挑战是，必须了解自然的限制、人类面对的选项，以及两者的互动。