John Chambers, chief executive of Cisco, claims the company's new TelePresence device will save $150 million in travel costs per year and lower emissions by 10 percent per employee.

InterCall and GreenConferencing.com also boast the "greenness" of web conferencing, including conference calls, video conferencing and web meetings.

Why bother paying for potential employees to fly into town for a job interview, why fly around for sales pitches and meetings, or even trek across town? With web conferencing tools, businesses can still get face-to-face contact but save a lot of money on transportation and time.