The cloud is coming back to Earth with a bump. That ethereal place where we store our data, stream our movies, and email the world has a physical presence – in hundreds of giant data centers that are taking a growing toll on the planet.
Data centers are the factories of the digital age. These mostly windowless, featureless boxes are scattered across the globe – from Las Vegas to Bangalore, and Des Moines to Reykjavik. They run the planet’s digital services. Their construction alone costs around $20 billion a year worldwide.
The biggest, covering a million square feet or more, consume as much power as a city of a million people. In total, they eat up more than 2 percent of the world’s electricity and emit roughly as much CO2 as the airline industry. And with global data traffic more than doubling every four years, they are growing fast.
Yet if there is a data center near you, the chances are you don’t know about it. And you still have no way of knowing which center delivers your Netflix download, nor whether it runs on renewable energy using processors cooled by Arctic air, or runs on coal power and sits in desert heat, cooled by gigantically inefficient banks of refrigerators.
We are often told that the world’s economy is dematerializing – that physical analog stuff is being replaced by digital data, and that this data has minimal ecological footprint. But not so fast. If the global IT industry were a country, only China and the United States would contribute more to climate change, according to a Greenpeace report investigating “the race to build a green internet,” published last year. [Continue reading…]