The concept of 'environmental carrying capacity' refers to the maximum population size of a species that an ecosystem can sustain indefinitely, given the available resources. In ecological studies, this notion is often applied to human populations, where it becomes intertwined with technological advancement. While some argue that innovation can continually expand carrying capacity, others contend that there are biophysical limits that technology cannot overcome. A key factor is the distinction between renewable and non-renewable resources. For renewable resources, sustainable use depends on consumption rates not exceeding regeneration rates. For non-renewable resources, depletion is inevitable, but the timeline can be extended through recycling and substitution. Recent research suggests that the concept is not static; it shifts with changes in consumption patterns, social organization, and environmental conditions. Therefore, assessing human carrying capacity requires a multidisciplinary approach, integrating ecology, economics, and sociology to predict future sustainability accurately.
❓ According to the passage, what is a central challenge in applying the concept of carrying capacity to human populations?
A. A. The concept only applies to non-human species.
B. B. Technological advancement can always solve resource depletion.
C. C. Human carrying capacity is influenced by dynamic factors beyond simple biological limits.
D. D. Renewable resources are not relevant to human carrying capacity.
✅ 正确答案
C. Human carrying capacity is influenced by dynamic factors beyond simple biological limits.
IELTS Reading Tips
Skim the questions first, underline keywords, then locate in the passage
Watch for paraphrasing; correct answers are often reworded
Be wary of absolute statements (all, always, never) — usually wrong
Pay attention to content after transition words (however, but, yet)
Manage time: about 20 minutes per passage; skip difficult questions first