The print ads, going up in nearly 100 office buildings in Southern California, are part of a $5 million contribution to World Wildlife Fund by Media 25 as the year-old company rolls out its workplace advertising concept in cities across America.

Through its exclusive agreements with owners and managers of some of the area's top class A office buildings, Media 25 offers advertisers a unique opportunity to reach busy professionals where they work. Media 25 presents its magazine-style print ads in an uncluttered environment, delivers them with tremendous frequency and supports its approach with a money-back guarantee.

The national debut of Media 25's Advertising @ Work! comes at a time when many commercial property owners are looking for new revenue streams to offset rising costs and falling occupancy, and advertisers are searching for new ways to measure the efficacy of the money they spend on various forms of advertising.