Final answer:
One-fifth of the world's population in the developed world consumes three-quarters of the world's goods, highlighting significant consumption inequality and environmental sustainability concerns. d. two-thirds
Step-by-step explanation:
According to the available textbook information, one-fifth of the world living in the developed world consumes three-quarters of the world's goods. This substantial consumption disparity highlights significant global inequality in resource distribution and consumption rates. While high-income countries represent a smaller fraction of the global population, their outsized consumption leads to greater resource usage and contributes to ecological challenges.
Furthermore, this uneven consumption has implications for environmental sustainability, as current consumption patterns are not sustainable if the rest of the world were to reach similar consumption levels. The text emphasizes the importance of addressing the gap in consumption to prevent ecological devastation and encourage a balance that could prevent future resource-related conflicts and environmental crises.