Coronavirus: How Europeans are preparing for Christmas and New Year
Streaming a TV show in old-fashioned standard definition can significantly reduce your carbon emissions, a new report from scientists at the UK’s Royal Society says.
HD video streaming on a phone generates about eight times more in emissions than standard definition (SD), it says.
And, on a small screen, the viewer might not even notice the difference.
Platforms and regulators should limit streaming resolution and default to SD, the authors urged.
The report says digital technology’s estimated contribution to global emissions ranges from 1.4% to 5.9% of the global total.
Another simple way to save energy is for people streaming music to turn off any accompanying video if they’re just listening, not watching, the authors say.
They estimate such small moves could save up to 5% of the emissions from a streaming service – a reduction comparable to what’s achieved by running YouTube’s servers on renewable energy.
Keep phones longer
The report also suggests owning and using devices for longer before trading them in, because the emissions created in making a new device are significant.
If you change your mobile phone every two years, the manufacturing represents about half of all the emissions it will generate through its lifetime.
But if individuals keep their phones for four years instead of two, that contribution is halved.
For the same reason, the report says buying a device second-hand – or sharing equipment – also reduce the share of so-called “embodied emissions”.
‘Small fraction'
Another co-author of the report, Prof Corinne Le Querre from the University of East Anglia, told BBC News: “To be honest, digital tech is a small fraction of your emissions compared with, say flying even once a year – but every bit of CO2 saving is significant.
“What’s more, we’re trying to prompt people to harness the power of digital to help tackle climate change.
“The way we heat our homes, for instance, is a nonsense. We occupy part of house but heat the whole thing. We can cure that by using digital technology.
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