❓ 题目 According to the passage, which of the following is a major criticism of the ecological footprint as mentioned by the author?
- A. A. It overestimates the productive capacity of high-income countries.
- B. B. It fails to account for non-carbon pollutants and regional ecological differences.
- C. C. It is too difficult for policymakers to understand and apply in practice.
- D. D. It disregards the environmental impact of carbon dioxide emissions.