Inspired from What’s the carbon footprint of an email? and other recent questions that made me reconsider the "immaterial" internet usage.
I am curious about updated statistics about the carbon footprint browsing the internet (it should probably be divided by service, since facebook and gmail recently claimed to be have moved to sustainable data centers, while I haven't any idea about amazon web service, or stackoverflow :) ) and about computer usage in general.
I found a nice idea in cloud carbon, a chrome extension that shows your carbon footprint, but it's still far from accurate (for example, looking in the source code, you see that they just estimated facebook carbon footprint equal to the computer usage). There is also a project from Microsoft but I can't try it now.