Step 1: Understanding the Kyoto Protocol
- The Kyoto Protocol is an international treaty aimed at addressing climate change by reducing greenhouse gas emissions.
- It was adopted in 1997 in Kyoto, Japan, and entered into force in 2005. The protocol legally binds developed countries to limit their emissions and to help reduce global warming.
Step 2: Analyzing the Options
- (A) Disarmament: Incorrect, the Kyoto Protocol is not related to disarmament. It is a treaty related to environmental protection.
- (B) Environmental protection: Correct, the Kyoto Protocol is directly related to environmental protection and climate change.
- (C) Refugee problem: Incorrect, the Kyoto Protocol does not address the refugee problem.
- (D) None of these: Incorrect, option (B) is the correct answer.
Step 3: Conclusion
The Kyoto Protocol focuses on reducing greenhouse gas emissions to protect the environment and combat global warming.
\[
\boxed{\text{Correct Answer: (B) Environmental protection}}
\]