Which sustainable initiative has been shown to reduce a typical research laboratory's carbon footprint by the largest percentage?

Scientific laboratories are essential for research and development but often consume significant energy and generate substantial waste. Modern science is increasingly focusing on sustainability initiatives to reduce environmental impact while maintaining research quality. This poll tests your knowledge about recent innovations in sustainable laboratory practices and their impact on reducing the carbon footprint of scientific research.

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Switching to energy-efficient ultra-low temperature freezers (-80°C) with hydrocarbon refrigerants
Implementing paperless laboratory notebooks and digital data management systems
Converting to LED lighting throughout laboratory facilities
Adopting shared equipment programs across research departments