Which sustainable innovation has most significantly reduced the environmental impact of modern commercial telescope manufacturing in the last decade?

The astronomy industry faces unique sustainability challenges in product development. From high-powered telescopes to space observatories, astronomical equipment consumes significant resources and energy. This trivia question explores how leading astronomy product developers are addressing environmental concerns while advancing our ability to explore the cosmos. Test your knowledge about the intersection of astronomy and sustainable product development!

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3D-printed composite housings made from recycled ocean plastics, reducing both carbon footprint and waste
Exclusively solar-powered manufacturing facilities that operate only during daylight hours
Replacement of all glass elements with plant-based transparent biopolymers
Quantum efficiency coatings that eliminate the need for traditional mirror materials