Who have recently tried to put price tagson nature's life support services ?

Options

A. Robert May and his collegues
B. Herbert Boyer and his colleagues
C. Robert Costanza and his colleagues
D. Ramdeo Misra andhis colleagues

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks who has recently attempted to assign monetary values to nature's life support services.

2. **Understand Nature's Life Support Services**: These services include essential functions provided by nature, such as the availability of oxygen, food production, and other ecological processes that sustain life on Earth.

3. **Recognize the Contributor**: The individual who has put a price tag on these life support services is Robert Constanza, along with his colleagues.

4. **Quantify the Value**: Robert Constanza and his team estimated the total value of nature's life support services to be approximately 33 trillion US dollars.

5. **Contextualize the Value**: This amount is significant as it is three times the global gross national product (GNP), which is around 18 trillion US dollars. This comparison highlights the immense value of these natural services.

6. **Conclude the Answer**: Therefore, the correct answer to the question is Robert Constanza and his colleagues.

**Final Answer**: Robert Constanza and his colleagues have recently tried to put price tags on nature's life support services.

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