❓ 题目 According to the passage, which of the following is a primary criticism of the ecological footprint metric?
- A. A. It overemphasizes local environmental issues such as water scarcity.
- B. B. It aggregates diverse environmental impacts into a single unit, hiding regional differences.
- C. C. It relies too heavily on renewable energy data, making it inaccurate.
- D. D. It is too complex for public understanding and policy-making.