Which major astronomical observatory pioneered carbon neutrality in 2015 by implementing a comprehensive sustainability program that has since been adopted as a model by observatories worldwide?

The astronomy industry has been making significant strides in sustainability initiatives over the past decade. From eco-friendly observatory designs to renewable energy powering massive telescopes, astronomical research facilities worldwide are working to reduce their environmental impact while still advancing our understanding of the cosmos. Test your knowledge about how astronomical organizations are balancing their mission to explore the universe with their responsibility to protect our home planet.

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European Southern Observatory (ESO) in Chile's Atacama Desert
W. M. Keck Observatory in Hawaii
Atacama Large Millimeter/submillimeter Array (ALMA)
NASA's Jet Propulsion Laboratory (JPL) for its Deep Space Network