Which music streaming method consumes the LEAST amount of carbon emissions per hour of listening, according to recent environmental impact studies?

The music industry has dramatically shifted from physical to digital formats over the past two decades, transforming how we consume music. While streaming platforms have made music more accessible than ever, they also come with environmental impacts that many fans don't consider. This poll explores the sustainability aspects of music streaming and how the industry is addressing its carbon footprint.

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Streaming music via a 4G mobile network connection
Streaming music via WiFi on a home broadband connection
Streaming music via Bluetooth from a downloaded playlist
Streaming music through a smart speaker using a voice assistant