Next time you watch videos in high resolution, pause for thought. Your decision may be having an unnecessary impact on the environment.
Watching videos on a smartphone in high resolution produces eight times as much carbon as viewing in standard definition, according to a report from the Royal Society. It adds that the difference in resolution is unlikely to be noticed on small screens anyway and suggests that the users should make a sensible choice in some circumstances.
"Avoiding streaming in unnecessarily high resolution will help reduce emissions," the report says. "Platforms and regulators should consider limiting streaming resolution." It recommends that, as part of a move "responsible streaming", video should be turned off for many YouTube users who are only listening to the content. A previous study found that such a move could save between 1 per cent and 5 per cent of YouTube's total emissions.
The authors do not calculate how much a person's carbon footprint would be reduced by watching videos in lower resolution. However, they admitted that digital technology also plays a significant role in reducing emissions, such as by enabling people to communicate virtually rather than travel to meet face to face. "Digital technology lets us do things differently and it has huge potential to help reducing emissions—if used responsibly," said Adrian Friday, professor from the University of Lancaster, who is a member of the working group for the report.
Using laptops, tablets, smart TVs and other devices for longer before upgrading will also reduce emissions, the report says. "Protecting and repairing phones is good practice to help keep them longer. Getting a phone or other device second-hand, or passing it on, and sharing equipment are other good ways."
