From New York to L.A and from Tampa to Washington D.C., Time Warner is observing Earth Day by powering down non-essential lighting at nearly thirty locations in nine different cities.

The power down also marks the launch of a new employee energy-awareness program sponsored by the Time Warner Global Energy Council. The council, which was formed last year and has representatives from each of the company’s divisions, as well as Time Warner’s Corporate Social Responsibility department, aims to save money and significantly lower the company’s carbon footprint by helping employees make changes in their office energy use. Simple measures, like turning off office lights at the end of the day or powering down PCs and printers can reduce the energy used by these devices by up to 75% a year – getting the green light at Time Warner now has a whole new meaning.