Which sustainable practice has revolutionized telescope manufacturing in recent years, significantly reducing the industry's carbon footprint?

The astronomy retail sector has been evolving to embrace sustainability practices while meeting the growing demands of stargazers and space enthusiasts. From telescope manufacturers to observatory gift shops, businesses are finding innovative ways to reduce their environmental footprint. Test your knowledge about how the astronomy retail industry is addressing sustainability challenges while still delivering quality products for exploring the cosmos.

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The adoption of recycled aluminum and carbon fiber materials in telescope tubes and mounts
Using solar-powered factories to manufacture optical glass for lenses
Implementing blockchain technology to trace the origin of rare earth minerals used in electronic components
Developing biodegradable lens coatings made from algae extracts