Cisco's strategy for a greener future

Networking giant Cisco 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. ZDNet.com's Sumi Das looks at green innovations at Cisco, including a high-definition videoconferencing system, energy-efficient datacentres, and a new office environment that encourages employees to work from unassigned spaces.