Which sustainability initiative has the European Southern Observatory (ESO) implemented at its Very Large Telescope facility in Chile's Atacama Desert?

Astronomy and space exploration are evolving with a growing focus on sustainability. As we venture further into space and develop more advanced observatories, the industry faces unique environmental challenges both on Earth and beyond. From reducing the carbon footprint of massive telescope operations to addressing space debris, astronomical institutions are pioneering innovative sustainability initiatives. Test your knowledge about how the astronomy sector is embracing eco-friendly practices while still pushing the boundaries of cosmic discovery.

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A solar farm that provides over 50% of the observatory's daytime energy needs
A hydrogen fuel cell system that powers all telescope operations during nighttime viewing
A carbon capture facility that offsets emissions from nearby mining operations
A water recycling system that produces drinking water from atmospheric moisture for local communities