Information technology is a resource intensive industry. It requires loads of energy to run, and lots of raw materials, particularly metals, to make cellphones, computers, what have you. Some of these materials are running a little short. For example, columbite-tantalite, a metallic ore used to create capacitors for electronic equipment, is in pretty short supply. A lot of it came from the Congo, where it fuelled a bloody civil war that left 3 million dead. Egypt is now a supplier as well, but there is less and less to go around.
Finally, we have energy. Microsoft and Google are well ahead of the game, both of whom are building data centers in the Northwest to take advantage of the 2 cents a kilowatt-hour hydropower that is available. They need the cheap juice to support the hundreds of millions of users doing searches and checking email. Incidentally, they supply these services as 'free' to end users. Although I do believe that it is probably the most efficient way to provide these services, it doesn't seem to be as free as it sounds.