Thank you @mfmeulenbelt, what I got was also that, to use one example, that it would take four cyclists to power one modern server (used as an example of inefficiency in an article). Not particularly compelling.
The articles that @jesus2099 links have no power consumption specifics. And from one of them:
"While most media and public attention focuses on the largest data centers that power so-called cloud computing operations – companies that provide web-based and Internet services to consumers and businesses – these hyper-scale cloud computing data centers represent only a small fraction of data center energy consumption in the United States."
Since I don’t trust sensationalist news very much I don’t particularly believe that either, but there you go.
I’m totally open to having my mind changed if anyone can give me something concrete, until then I recommend making your next meal vegan or walking/biking to work as a much more effective way of saving the environment.