“Myth 5: Data Centers Are Great for the Environment
On the other hand, it’s also a fallacy to overestimate the sustainability of data centers.
Even in an age where data center owners are increasingly eager to source renewable energy, the majority of electricity on which most data centers depend comes from fossil fuels.
Plus, even data centers that do rely extensively on clean energy may only be able to do so intermittently, since the amount of electricity that you can generate from sources like solar and wind can vary significantly between different times of day or seasons of the year. As a result, even “green” data centers are not always green.”