Which groundbreaking sustainability initiative did the European Southern Observatory (ESO) implement at its Very Large Telescope facility in Chile to reduce environmental impact?

The astronomy industry faces unique environmental challenges - from light pollution to energy-intensive observatories. As we gaze at the stars, many organizations are implementing innovative sustainability initiatives to reduce their ecological footprint while advancing our understanding of the cosmos. Test your knowledge about how the astronomy sector is embracing eco-friendly practices in product development and operations.

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Developed the world's first carbon-negative mirror coating process that absorbs CO2 during application
Installed a solar farm that provides 100% of the daytime electricity needs, significantly reducing fossil fuel dependence
Created biodegradable telescope domes made from mycelium-based materials that decompose after 50 years
Implemented orbital debris collection technology that converts space junk into telescope components