Which of the following refrigerants has the lowest global warming potential? (A) A) R-134a (B) B) R-600a (C) Q)R-410A (D) D) R-407C

R-600a, also known as isobutane, has the lowest global warming potential of the refrigerants listed. Unlike many synthetic refrigerants, R-600a is a natural hydrocarbon that boasts a much lower GWP and is more environmentally friendly, making it a preferred choice for eco-conscious refrigeration applications. When considering refrigerant choices, it's crucial to look beyond just the GWP. Real-world application also involves safety measures, as some refrigerants, like R-600a, are flammable. Proper leak detection and ventilation can help mitigate risks, ensuring a safe and efficient refrigeration system while benefiting the environment.