Upgrading cell towers could save enough energy to power entire cities

Upgrading to more efficient cellular radio towers could save enough electricity to power cities such as Phoenix, New Orleans or Seattle, according to a new study produced by US research firm J. Gold Associates. Annually, US cell sites use a total of almost 21 million megawatt hours (MWh) of power. That's the equivalent of the average power used by almost two million households. "Cellular services have become a critical infrastructure component of modern life. It's hard to imagine not being able to communicate on the go with our mobile devices, or increasingly through a wireless home gateway enabling Internet services to both residential and business customers," the report said.