Data Centers Need Redundant Backup Power, Usually Batteries and Diesel Fuel Generators
Data storage is measured in bytes. The letter N, for example, takes 1 byte to store. A gigabyte is a billion bytes of information. Roughly a million gigabytes are processed and stored in a data center during the creation of a single 3-D animated movie. The New York Stock Exchange produces up to 2,000 gigabytes of data per day that must be stored for years.
To guard against a power failure, they further rely on banks of generators that emit diesel exhaust. The pollution from data centers has increasingly been cited by the authorities for violating clean air regulations, documents show. In Silicon Valley, many data centers appear on the state government’s Toxic Air Contaminant Inventory, a roster of the area’s top stationary diesel polluters.