Which major astronomical facility has implemented the most comprehensive sustainability program, reducing its carbon footprint by over 40% since 2015 through renewable energy integration?

As astronomical observatories and space agencies face growing environmental concerns, sustainability initiatives have become increasingly important in this field. From reducing light pollution to implementing eco-friendly practices at major observatories, astronomy is embracing sustainability in unique ways. Test your knowledge about how the astronomy industry is working to protect our planet while studying the cosmos.

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European Southern Observatory (ESO) in Chile
W. M. Keck Observatory in Hawaii
Atacama Large Millimeter Array (ALMA)
Square Kilometre Array (SKA) in South Africa and Australia