Which government sustainability initiative was the first to receive UN recognition and was subsequently adopted by over 50 countries' public buildings?

Government agencies worldwide are increasingly implementing sustainability initiatives to combat climate change and promote environmental responsibility. These initiatives not only help reduce carbon footprints but also set examples for citizens and businesses. This trivia poll tests your knowledge about a pioneering sustainability program that revolutionized how government buildings operate and influenced public policy across multiple countries. Can you identify which initiative was the first to receive international recognition and adoption?

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LEED Zero Carbon Certification Program (2008)
Green Building Council's Government Pledge (2010)
Energy Star for Government Buildings Program (2003)
Carbon Neutral Government Protocol (2012)