With no physical media to manufacture and transport, you might expect digital music – whether downloads or streaming – to be better for the environment than old-school vinyl or CDs. But a new study suggests this isn’t necessarily the case.

It also gives an interesting insight into how much we have paid for music between phonograph cylinders in 1907 and streaming services like Apple Music today …

Billboard reports on a study conducted by two European universities.

In fact, says the study, greenhouse gas emissions generated by digital music exceeds that created by the plastics used to make each of vinyl, cassettes and CDs in their respective peak production periods.

“These figures seem to confirm the widespread notion that music digitalised is music dematerialised,” said University of Oslo Associate Professor and lead researcher Dr. Kyle Devine in a statement, referencing statistics citing the decrease in plastics use since the year 2000. “The figures may even suggest that the rises of downloading and streaming are making music more environmentally friendly. But a very different picture emerges when we think about the energy used to power online music listening. Storing and processing music online uses a tremendous amount of resources and energy — which [have] a high impact on the environment” […]

Of course, the study does raise questions, as Engadget notes in its coverage.

Additionally, the sheer convenience of digital music means that we’re listening to much more of it than we used to in the days when we had to lug around a Walkman or Discman.

We’re also individually paying less for music than ever before – although the music industry is seeing growing revenues.

The researchers say they aren’t calling on us to stop listening music, merely to be more conscious of the environmental cost – like not leaving music playing in a room when we’re elsewhere in the home.

The research also shows that when plotted against the changing average salary of a US citizen over history, consumers were willing to pay roughly 4.83% of an average weekly salary in vinyl’s peak year of production in 1977, a price which slips down to roughly 1.22% of an average weekly salary in 2013, the peak of digital album sales.

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