What is the amount of average price tag on nature's life support services determined by Robert Constanza and his colegues?

Options

A. US `$` 3 trillion a year
B. US `$` 13 trillion a year
C. US `$` 23 trillion a year
D. US `$` 33 trillion a year

Answer

To determine the average price tag on nature's life support services as established by Robert Costanza and his colleagues, we can follow these steps:

1. **Identify the Research**: Robert Costanza and his colleagues conducted a study to estimate the economic value of ecosystem services. This research aimed to quantify the benefits that nature provides to humanity.

2. **Understand the Context**: Ecosystem services include a wide range of benefits such as clean air, water purification, pollination of crops, climate regulation, and many others that are essential for human survival and well-being.

3. **Review the Findings**: In their study, Costanza and his team estimated the total value of these ecosystem services. The findings were significant and highlighted the importance of preserving natural ecosystems.

4. **Determine the Amount**: According to the research conducted by Costanza and his colleagues, the average price tag on nature's life support services was determined to be **US$33 trillion a year**.

5. **Select the Correct Option**: Given the options provided in the question, the correct answer is **US$33 trillion a year**.