Power, Pollution and the Internet - NYTimes.com
Enquête très complète
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. Worldwide, the digital warehouses use about 30 billion watts of electricity, roughly equivalent to the output of 30 nuclear power plants, according to estimates industry experts compiled for The Times. Data centers in the United States account for one-quarter to one-third of that load, the estimates show.
In Manassas, Va., the retailing colossus Amazon runs servers for its cloud amid a truck depot, a defunct grain elevator, a lumberyard and junk-strewn lots where machines compress loads of trash for recycling.
The servers are contained in two Amazon data centers run out of three buildings shaped like bulky warehouses with green, corrugated sides. Air ducts big enough to accommodate industrial cooling systems sprout along the rooftops; huge diesel generators sit in rows around the outside.