Some sources, not very recent but with great links to more detailed studies:
https://css.umich.edu/factsheets/green-it-factsheet
https://www.fcgov.com/climatewise/pdf/computers.pdfArguably, none of these account for the pollution due to extraction/refinement of materials, which is another concern raised with building more stuff. Recycling is also a polluting process (usually less so than new extraction) but unfortunately most electronics is never recycled and R&D in the hardware world is mostly focused on raw performance and does not even try to optimize for recyclability.
If any government cared at all about climate change, they would mandate hardware manufacturers to publish hardware sheets (for long-term maintenance and interoperability [0]), outlaw throwaway single-purpose computers (as opposed to flashable general-purpose computers [1]) and planned obsolescence, and invest massively in two key areas:
- green IT R&D: there's very little universities around the world working on this, and they operate on a shoestring budget
- public-service repair shops for electronics: it's ridiculously hard (or expensive) to find electronics repair services even in big cities, but having skilled people do a 1$ part change on a device that would otherwise be thrown away (eg. soldering a new micro-USB connector or changing a burnt capacitor) goes to great lengths to extend the lifetime of existing devices
I'm interested if people have more links/resources to share on that topic!
[0] https://www.usenix.org/conference/osdi21/presentation/fri-ke...
[1] https://boingboing.net/2011/12/27/the-coming-war-on-general-...