Green Enterprise video: Cisco aims to cut energy use

Networking giant Cisco Systems has a goal to reduce greenhouse gas emissions from its operations by 25 percent in the next four years--with the help of technologies it's created. Cisco also wants to help customers do the same. Correspondent Sumi Das looks at green innovations at Cisco, including: an HD video-conferencing system, energy-efficient data centers, and a new office environment that encourages employees to work from unassigned spaces.