Google may be taking another crack at tracking home energy use. According to The Information, the tech giant is currently testing web-connected thermostats that let users view home energy activity, and make adjustments. If that sounds familiar, its because Google attempted something similar a few years ago called PowerMeter, a web dashboard that tracked an entire homes energy use. The program was killed off in mid-2011, with Google citing difficulties scaling it up. However the original mission statement for the effort, and what Google reiterated when killing off PowerMeter, was that people could trim energy use by 15 percent if they could see what was happening.