According to Robert Constanza average price tag for ecosystem services is

Options

A. US $ 18 trillion
B. US $ 33 trillion
C. US $ 180 trillion
D. US $ 13 trillion

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the average price tag for ecosystem services according to Robert Costanza.

2. **Recall Relevant Information**: Robert Costanza is a well-known ecologist who has contributed significantly to the understanding of ecosystem services and their economic value.

3. **Review the Options**: The options given are:
- A) US$18 trillion
- B) US$33 trillion
- C) US$180 trillion
- D) US$13 trillion

4. **Analyze the Information from the Transcript**: According to the video transcript, Robert Costanza and his colleagues have assigned an average price tag of US$33 trillion to ecosystem services.

5. **Select the Correct Option**: Based on the information provided, the correct answer is B) US$33 trillion.

6. **Conclusion**: Therefore, the average price tag for ecosystem services according to Robert Costanza is US$33 trillion.

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