Which major observatory or space agency pioneered the first large-scale carbon-neutral certification program specifically designed for astronomical facilities in 2022?

Space exploration and astronomy research generate significant environmental impacts, from rocket launches to observatory operations. In recent years, astronomical organizations have been implementing various sustainability initiatives to reduce their carbon footprint and environmental impact. Test your knowledge about these green efforts in the astronomy industry!

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European Southern Observatory (ESO) with their 'Zero Horizon' initiative
NASA with their 'Green Space' certification program
Chinese National Space Administration (CNSA) with their 'Sustainable Stars' project
International Astronomical Union (IAU) with their 'Carbon Neutral Cosmos' framework