Which country was the first to implement a legally binding 'Green Public Procurement' policy requiring environmental criteria in all government purchasing decisions?

Environmental sustainability has become a critical focus for governments worldwide. Through green procurement policies, governments are using their purchasing power to drive market transformation and reduce environmental impacts. This trivia question tests your knowledge about which government has been a global leader in implementing comprehensive sustainable procurement practices that have significantly influenced both public and private sectors.

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Sweden (with its groundbreaking Environmental Code of 1999)
Japan (with its Green Purchasing Law of 2000)
Germany (with its Federal Procurement Reform of 2002)
South Korea (with its Act on Promotion of Purchase of Green Products of 2005)